The number 21482
21482 is a composite number with 8 divisors. Its prime factorisation is 2 × 23 × 467. Divisors (8): 1, 2, 23, 46, 467, 934, 10741, 21482.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
21482 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
21482 is composite. Its prime factorisation is
- 3
The divisors add up to 33696; without 21482 itself that is 12214, so 21482 is deficient (12214 is less than 21482). Euler's totient φ(21482) = 10252 numbers up to 21482 share no factor with it.
- 4
The digits of 21482 add up to 17, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 100 steps to reach 1.
LaTeX source of the formulas on this page
\[ 21482 = 2 \times 23 \times 467 \]
21482 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 33696 |
| Euler totient φ(n) | 10252 |
| Square | 461476324 |
| Cube | 9913434392168 |
| Square root | 146.567391 |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 100 |
| Scientific notation | 2.1482 × |
21482 in other forms
| Form | Value |
|---|---|
| In words | twenty-one thousand four hundred and eighty-two |
| Binary (base 2) | 101001111101010 |
| Octal (base 8) | 51752 |
| Hexadecimal (base 16) | 53EA |
| Base 3 | 1002110122 |
| As time | 21482 seconds = 5 h 58 min 2 s |
Is 21482 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (21482 ÷ 2 = 10741) | 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 2) | 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 | No (remainder 6) | 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 8) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 2) | 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 21482 a prime number?
No. 21482 = 2 × 23 × 467, so it is divisible by 2.
What are the factors of 21482?
1, 2, 23, 46, 467, 934, 10741, 21482.
What is 21482 in binary?
101001111101010 (hexadecimal 53EA, octal 51752).
What is the square root of 21482?
About 146.5674.
Is 21482 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 21482?
It is a composite number with 8 divisors.