The number 18139
18139 is a composite number with 8 divisors. Its prime factorisation is 11 × 17 × 97. Divisors (8): 1, 11, 17, 97, 187, 1067, 1649, 18139.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
18139 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
18139 is composite. Its prime factorisation is
- 3
The divisors add up to 21168; without 18139 itself that is 3029, so 18139 is deficient (3029 is less than 18139). Euler's totient φ(18139) = 15360 numbers up to 18139 share no factor with it.
- 4
The digits of 18139 add up to 22, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 185 steps to reach 1.
LaTeX source of the formulas on this page
\[ 18139 = 11 \times 17 \times 97 \]
18139 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 21168 |
| Euler totient φ(n) | 15360 |
| Square | 329023321 |
| Cube | 5968154019619 |
| Square root | 134.681105 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 185 |
| Scientific notation | 1.8139 × |
18139 in other forms
| Form | Value |
|---|---|
| In words | eighteen thousand one hundred and thirty-nine |
| Binary (base 2) | 100011011011011 |
| Octal (base 8) | 43333 |
| Hexadecimal (base 16) | 46DB |
| Base 3 | 220212211 |
| As time | 18139 seconds = 5 h 2 min 19 s |
Is 18139 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 1) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 4) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 2) | 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 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 4) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 9) | A number is divisible by 10 if the last digit is 0. |
| 11 | Yes (18139 ÷ 11 = 1649) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 18139 a prime number?
No. 18139 = 11 × 17 × 97, so it is divisible by 11.
What are the factors of 18139?
1, 11, 17, 97, 187, 1067, 1649, 18139.
What is 18139 in binary?
100011011011011 (hexadecimal 46DB, octal 43333).
What is the square root of 18139?
About 134.6811.
Is 18139 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 18139?
It is a composite number with 8 divisors.