The number 18317
18317 is a composite number with 4 divisors. Its prime factorisation is 13 × 1409. Divisors (4): 1, 13, 1409, 18317.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 18317: a semiprime: 13 × 1409, the product of two primes.
- 2
18317 is composite. Its prime factorisation is
- 3
The divisors add up to 19740; without 18317 itself that is 1423, so 18317 is deficient (1423 is less than 18317). Euler's totient φ(18317) = 16896 numbers up to 18317 share no factor with it.
- 4
The digits of 18317 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 110 steps to reach 1.
LaTeX source of the formulas on this page
\[ 18317 = 13 \times 1409 \]
18317 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 19740 |
| Euler totient φ(n) | 16896 |
| Square | 335512489 |
| Cube | 6145582261013 |
| Square root | 135.340312 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 110 |
| Scientific notation | 1.8317 × |
18317 in other forms
| Form | Value |
|---|---|
| In words | eighteen thousand three hundred and seventeen |
| Binary (base 2) | 100011110001101 |
| Octal (base 8) | 43615 |
| Hexadecimal (base 16) | 478D |
| Base 3 | 221010102 |
| As time | 18317 seconds = 5 h 5 min 17 s |
Is 18317 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | No (remainder 1) | 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 1) | 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 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 5) | 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 5) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 7) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 2) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 18317 a prime number?
No. 18317 = 13 × 1409, so it is divisible by 13.
What are the factors of 18317?
1, 13, 1409, 18317.
What is 18317 in binary?
100011110001101 (hexadecimal 478D, octal 43615).
What is the square root of 18317?
About 135.3403.
Is 18317 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 18317?
18317 is a semiprime: 13 × 1409, the product of two primes.