The number 11918
11918 is a composite number with 8 divisors. Its prime factorisation is 2 × 59 × 101. Divisors (8): 1, 2, 59, 101, 118, 202, 5959, 11918.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
11918 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
11918 is composite. Its prime factorisation is
- 3
The divisors add up to 18360; without 11918 itself that is 6442, so 11918 is deficient (6442 is less than 11918). Euler's totient φ(11918) = 5800 numbers up to 11918 share no factor with it.
- 4
The digits of 11918 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 125 steps to reach 1.
LaTeX source of the formulas on this page
\[ 11918 = 2 \times 59 \times 101 \]
11918 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 18360 |
| Euler totient φ(n) | 5800 |
| Square | 142038724 |
| Cube | 1692817512632 |
| Square root | 109.169593 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 125 |
| Scientific notation | 1.1918 × |
11918 in other forms
| Form | Value |
|---|---|
| In words | eleven thousand nine hundred and eighteen |
| Binary (base 2) | 10111010001110 |
| Octal (base 8) | 27216 |
| Hexadecimal (base 16) | 2E8E |
| Base 3 | 121100102 |
| As time | 11918 seconds = 3 h 18 min 38 s |
Is 11918 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (11918 ÷ 2 = 5959) | 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 3) | 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 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 6) | 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 8) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 5) | 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 11918 a prime number?
No. 11918 = 2 × 59 × 101, so it is divisible by 2.
What are the factors of 11918?
1, 2, 59, 101, 118, 202, 5959, 11918.
What is 11918 in binary?
10111010001110 (hexadecimal 2E8E, octal 27216).
What is the square root of 11918?
About 109.1696.
Is 11918 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 11918?
It is a composite number with 8 divisors.