20486 in Binary

The process of converting 20486 from decimal to binary involves dividing the number 20486 by 2. Here, it is divided by 2 because the binary number system uses only 2 digits (0 and 1).

The quotient becomes the dividend in the next step, and the process continues until the quotient becomes 0. This is a commonly used method to convert 20486 to binary. In the last step, the remainder is noted down bottom side up, and that becomes the converted value.

For example, the remainders noted down after dividing 20486 by 2 until getting 0 as the quotient is 101000000111110. Remember, the remainders here have been written upside down.

In the table shown below, the first column shows the binary digits (1 and 0) as 101000000111110.

The second column represents the place values of each digit, and the third column is the value calculation, where the binary digits are multiplied by their corresponding place values.

The results of the third column can be added to cross-check if 101000000111110 in binary is indeed 20486 in the decimal number system.

20486 can be converted easily from decimal to binary. The methods mentioned below will help us convert the number. Let’s see how it is done.

Expansion Method: Let us see the step-by-step process of converting 20486 using the expansion method.

Step 1 - Figure out the place values: In the binary system, each place value is a power of 2. Therefore, in the first step, we will ascertain the powers of 2. 2^0 = 1 2^1 = 2 2^2 = 4 2^3 = 8 2^4 = 16 ... Continue until 2^14 = 16384 Since 16384 is less than 20486, we use it.

Step 2 - Identify the largest power of 2: In the previous step, we used 2^14 = 16384. This is because in this step, we have to identify the largest power of 2, which is less than or equal to the given number, 20486. Since 2^14 is the number we are looking for, write 1 in the 2^14 place. Now the value of 2^14, which is 16384, is subtracted from 20486. 20486 - 16384 = 4102.

Step 3 - Identify the next largest power of 2: In this step, we need to find the largest power of 2 that fits into the result of the previous step, 4102. So, the next largest power of 2 is 2^12 = 4096. Now, we have to write 1 in the 2^12 places. And then subtract 4096 from 4102. 4102 - 4096 = 6.

Step 4 - Identify the next largest power of 2: The largest power of 2 that fits into 6 is 2^2 = 4. Write 1 in the 2^2 place and subtract 4 from 6. 6 - 4 = 2.

Step 5 - Identify the next largest power of 2: The largest power of 2 that fits into 2 is 2^1 = 2. Write 1 in the 2^1 place and subtract 2 from 2. 2 - 2 = 0. We need to stop the process here since the remainder is 0.

Step 6 - Identify the unused place values: In steps 2 to 5, we wrote 1 in the 2^14, 2^12, 2^2, and 2^1 places. Now, we can just write 0s in the remaining places. Now, by substituting the values, we get: 0 in the 2^0 place 1 in the 2^1 place 1 in the 2^2 place 0 in the 2^3 place 0 in the 2^4 place 0 in the 2^5 place 0 in the 2^6 place 0 in the 2^7 place 0 in the 2^8 place 0 in the 2^9 place 0 in the 2^10 place 0 in the 2^11 place 1 in the 2^12 place 0 in the 2^13 place 1 in the 2^14 place

Step 7 - Write the values in reverse order: We now write the numbers upside down to represent 20486 in binary. Therefore, 101000000111110 is 20486 in binary.

Grouping Method: In this method, we divide the number 20486 by 2. Let us see the step-by-step conversion.

Step 1 - Divide the given number 20486 by 2. 20486 / 2 = 10243. Here, 10243 is the quotient and 0 is the remainder.

Step 2 - Divide the previous quotient (10243) by 2. 10243 / 2 = 5121. Here, the quotient is 5121 and the remainder is 1.

Step 3 - Repeat the previous step. 5121 / 2 = 2560. Here, the quotient is 2560 and the remainder is 1.

Step 4 - Repeat the previous step. 2560 / 2 = 1280. Here, the quotient is 1280 and the remainder is 0.

Step 5 - Repeat the previous step. 1280 / 2 = 640. Here, the quotient is 640 and the remainder is 0.

Step 6 - Repeat the previous step. 640 / 2 = 320. Here, the quotient is 320 and the remainder is 0.

Step 7 - Repeat the previous step. 320 / 2 = 160. Here, the quotient is 160 and the remainder is 0.

Step 8 - Repeat the previous step. 160 / 2 = 80. Here, the quotient is 80 and the remainder is 0.

Step 9 - Repeat the previous step. 80 / 2 = 40. Here, the quotient is 40 and the remainder is 0.

Step 10 - Repeat the previous step. 40 / 2 = 20. Here, the quotient is 20 and the remainder is 0.

Step 11 - Repeat the previous step. 20 / 2 = 10. Here, the quotient is 10 and the remainder is 0.

Step 12 - Repeat the previous step. 10 / 2 = 5. Here, the quotient is 5 and the remainder is 0.

Step 13 - Repeat the previous step. 5 / 2 = 2. Here, the quotient is 2 and the remainder is 1.

Step 14 - Repeat the previous step. 2 / 2 = 1. Here, the quotient is 1 and the remainder is 0.

Step 15 - Repeat the previous step. 1 / 2 = 0. Here, the remainder is 1. And we stop the division here because the quotient is 0.

Step 16 - Write down the remainders from bottom to top. Therefore, 20486 (decimal) = 101000000111110 (binary).

There are certain rules to follow when converting any number to binary. Some of them are mentioned below:

Rule 1: Place Value Method

This is one of the most commonly used rules to convert any number to binary. The place value method is the same as the expansion method, where we need to find the largest power of 2. Let’s see a brief step-by-step explanation to understand the first rule. Find the largest power of 2 less than or equal to 20486. Since the answer is 2^14, write 1 next to this power of 2. Subtract the value (16384) from 20486. So, 20486 - 16384 = 4102. Find the largest power of 2 less than or equal to 4102. The answer is 2^12. So, write 1 next to this power. Now, 4102 - 4096 = 6. Find the largest power of 2 less than or equal to 6. The answer is 2^2. So, write 1 next to this power. Now, 6 - 4 = 2. Find the largest power of 2 less than or equal to 2. The answer is 2^1. So, write 1 next to this power. Now, 2 - 2 = 0. Since there is no remainder, we can write 0 next to the remaining powers. Final conversion will be 101000000111110.

Rule 2: Division by 2 Method

The division by 2 method is the same as the grouping method. A brief step-by-step explanation is given below for better understanding. First, 20486 is divided by 2 to get 10243 as the quotient and 0 as the remainder. Now, 10243 is divided by 2. Here, we will get 5121 as the quotient and 1 as the remainder. Dividing 5121 by 2, we get 2560 as the quotient and 1 as the remainder. Divide 2560 by 2 to get 1280 as the quotient and 0 as the remainder. Continue this process until the quotient becomes 0. Now, we write the remainders upside down to get the binary equivalent of 20486, 101000000111110.

Rule 3: Representation Method

This rule also involves breaking the number into powers of 2. Identify the powers of 2 and write them down in decreasing order i.e., 2^14, 2^13, 2^12, ..., 2^0. Find the largest power that fits into 20486. Repeat the process and allocate 1s and 0s to the suitable powers of 2. Combine the digits (0 and 1) to get the binary result.

Rule 4: Limitation Rule

The limitation of the binary system is that only 0s and 1s can be used to represent numbers. The system doesn’t use any other digits other than 0 and 1. This is a base 2 number system, where the binary places represent powers of 2. So, every digit is either a 0 or a 1. To convert 20486, we use 0s for unused powers and 1s for used powers.

Learning a few tips and tricks is a great way to solve any mathematical problems easily. Let us take a look at some tips and tricks for binary numbers up to 20486.

Memorize to speed up conversions: We can memorize the binary forms for smaller numbers to improve speed.

Recognize the patterns: There is a peculiar pattern when converting numbers from decimal to binary. 1 → 1 1 + 1 = 2 → 10 2 + 2 = 4 → 100 4 + 4 = 8 → 1000 8 + 8 = 16 → 10000 16 + 16 = 32 → 100000…and so on. This is also called the double and add rule.

Even and odd rule: Whenever a number is even, its binary form will end in 0. For example, 20486 is even, and its binary form is 101000000111110. Here, the binary of 20486 ends in 0. If the number is odd, then its binary equivalent will end in 1.

Cross-verify the answers: Once the conversion is done, we can cross-verify the answers by converting the number back to the decimal form. This will eliminate any unforeseen errors in conversion.

Practice by using tables: Writing the decimal numbers and their binary equivalents on a table will help us remember the conversions.

• Decimal: It is the base 10 number system, which uses digits from 0 to 9.

• Binary: This number system uses only 0 and 1. It is also called the base 2 number system.

• Place value: Every digit has a value based on its position in a given number.

• Octal: It is the number system with a base of 8. It uses digits from 0 to 7.

• Powers of 2: This refers to the exponents of 2 used in binary conversion, such as 2⁰, 2¹, 2², etc.