The number 18349
18349 is a composite number with 4 divisors. Its prime factorisation is 59 × 311. Divisors (4): 1, 59, 311, 18349.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 18349: a semiprime: 59 × 311, the product of two primes.
- 2
18349 is composite. Its prime factorisation is
- 3
The divisors add up to 18720; without 18349 itself that is 371, so 18349 is deficient (371 is less than 18349). Euler's totient φ(18349) = 17980 numbers up to 18349 share no factor with it.
- 4
The digits of 18349 add up to 25, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 123 steps to reach 1.
LaTeX source of the formulas on this page
\[ 18349 = 59 \times 311 \]
18349 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 18720 |
| Euler totient φ(n) | 17980 |
| Square | 336685801 |
| Cube | 6177847762549 |
| Square root | 135.458481 |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 123 |
| Scientific notation | 1.8349 × |
18349 in other forms
| Form | Value |
|---|---|
| In words | eighteen thousand three hundred and forty-nine |
| Binary (base 2) | 100011110101101 |
| Octal (base 8) | 43655 |
| Hexadecimal (base 16) | 47AD |
| Base 3 | 221011121 |
| As time | 18349 seconds = 5 h 5 min 49 s |
Is 18349 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 1) | 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 5) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 7) | 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 | No (remainder 1) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 18349 a prime number?
No. 18349 = 59 × 311, so it is divisible by 59.
What are the factors of 18349?
1, 59, 311, 18349.
What is 18349 in binary?
100011110101101 (hexadecimal 47AD, octal 43655).
What is the square root of 18349?
About 135.4585.
Is 18349 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 18349?
18349 is a semiprime: 59 × 311, the product of two primes.