The number 18316
18316 is a composite number with 12 divisors. Its prime factorisation is × 19 × 241. Divisors (12): 1, 2, 4, 19, 38, 76, 241, 482, 964, 4579, 9158, 18316.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 18316: a Harshad number: divisible by its digit sum 19.
- 2
18316 is composite. Its prime factorisation is
- 3
The divisors add up to 33880; without 18316 itself that is 15564, so 18316 is deficient (15564 is less than 18316). Euler's totient φ(18316) = 8640 numbers up to 18316 share no factor with it.
- 4
The digits of 18316 add up to 19, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 110 steps to reach 1.
LaTeX source of the formulas on this page
\[ 18316 = 2^{2} \times 19 \times 241 \]18316 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 12 |
| Sum of divisors | 33880 |
| Euler totient φ(n) | 8640 |
| Square | 335475856 |
| Cube | 6144575778496 |
| Square root | 135.336617 (= 2√4579) |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 110 |
| Scientific notation | 1.8316 × |
18316 in other forms
| Form | Value |
|---|---|
| In words | eighteen thousand three hundred and sixteen |
| Binary (base 2) | 100011110001100 |
| Octal (base 8) | 43614 |
| Hexadecimal (base 16) | 478C |
| Base 3 | 221010101 |
| As time | 18316 seconds = 5 h 5 min 16 s |
Is 18316 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (18316 ÷ 2 = 9158) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 1) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | Yes (18316 ÷ 4 = 4579) | 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 4) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 4) | 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 4) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 1) | 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 1) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 4) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 18316 a prime number?
No. 18316 = × 19 × 241, so it is divisible by 2.
What are the factors of 18316?
1, 2, 4, 19, 38, 76, 241, 482, 964, 4579, 9158, 18316.
What is 18316 in binary?
100011110001100 (hexadecimal 478C, octal 43614).
What is the square root of 18316?
About 135.3366, exactly 2√4579.
Is 18316 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 18316?
18316 is a Harshad number: divisible by its digit sum 19.