The number 13618
13618 is a composite number with 8 divisors. Its prime factorisation is 2 × 11 × 619. Divisors (8): 1, 2, 11, 22, 619, 1238, 6809, 13618.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
13618 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
13618 is composite. Its prime factorisation is
- 3
The divisors add up to 22320; without 13618 itself that is 8702, so 13618 is deficient (8702 is less than 13618). Euler's totient φ(13618) = 6180 numbers up to 13618 share no factor with it.
- 4
The digits of 13618 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 182 steps to reach 1.
LaTeX source of the formulas on this page
\[ 13618 = 2 \times 11 \times 619 \]
13618 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 22320 |
| Euler totient φ(n) | 6180 |
| Square | 185449924 |
| Cube | 2525457065032 |
| Square root | 116.696187 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 182 |
| Scientific notation | 1.3618 × |
13618 in other forms
| Form | Value |
|---|---|
| In words | thirteen thousand six hundred and eighteen |
| Binary (base 2) | 11010100110010 |
| Octal (base 8) | 32462 |
| Hexadecimal (base 16) | 3532 |
| Base 3 | 200200101 |
| As time | 13618 seconds = 3 h 46 min 58 s |
Is 13618 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (13618 ÷ 2 = 6809) | 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 | 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 4) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 3) | 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 1) | 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 | Yes (13618 ÷ 11 = 1238) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 13618 a prime number?
No. 13618 = 2 × 11 × 619, so it is divisible by 2.
What are the factors of 13618?
1, 2, 11, 22, 619, 1238, 6809, 13618.
What is 13618 in binary?
11010100110010 (hexadecimal 3532, octal 32462).
What is the square root of 13618?
About 116.6962.
Is 13618 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 13618?
It is a composite number with 8 divisors.