The number 20426
20426 is a composite number with 8 divisors. Its prime factorisation is 2 × 7 × 1459. Divisors (8): 1, 2, 7, 14, 1459, 2918, 10213, 20426.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 20426: a Harshad number: divisible by its digit sum 14.
- 2
20426 is composite. Its prime factorisation is
- 3
The divisors add up to 35040; without 20426 itself that is 14614, so 20426 is deficient (14614 is less than 20426). Euler's totient φ(20426) = 8748 numbers up to 20426 share no factor with it.
- 4
The digits of 20426 add up to 14, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 180 steps to reach 1.
LaTeX source of the formulas on this page
\[ 20426 = 2 \times 7 \times 1459 \]
20426 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 35040 |
| Euler totient φ(n) | 8748 |
| Square | 417221476 |
| Cube | 8522165868776 |
| Square root | 142.919558 |
| Digit sum / digital root | 14 / 5 |
| Collatz steps to 1 | 180 |
| Scientific notation | 2.0426 × |
20426 in other forms
| Form | Value |
|---|---|
| In words | twenty thousand four hundred and twenty-six |
| Binary (base 2) | 100111111001010 |
| Octal (base 8) | 47712 |
| Hexadecimal (base 16) | 4FCA |
| Base 3 | 1001000112 |
| As time | 20426 seconds = 5 h 40 min 26 s |
Is 20426 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (20426 ÷ 2 = 10213) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 2) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 1) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 2) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (20426 ÷ 7 = 2918) | A number is divisible by 7 if double the last digit and subtract it from the rest: the result is a multiple of 7. |
| 8 | No (remainder 2) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 5) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 6) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 10) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 20426 a prime number?
No. 20426 = 2 × 7 × 1459, so it is divisible by 2.
What are the factors of 20426?
1, 2, 7, 14, 1459, 2918, 10213, 20426.
What is 20426 in binary?
100111111001010 (hexadecimal 4FCA, octal 47712).
What is the square root of 20426?
About 142.9196.
Is 20426 divisible by 3?
No. Its digits add up to 14, which is not a multiple of 3.
What is special about the number 20426?
20426 is a Harshad number: divisible by its digit sum 14.