The number 18343
18343 is a composite number with 8 divisors. Its prime factorisation is 13 × 17 × 83. Divisors (8): 1, 13, 17, 83, 221, 1079, 1411, 18343.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
18343 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
18343 is composite. Its prime factorisation is
- 3
The divisors add up to 21168; without 18343 itself that is 2825, so 18343 is deficient (2825 is less than 18343). Euler's totient φ(18343) = 15744 numbers up to 18343 share no factor with it.
- 4
The digits of 18343 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 167 steps to reach 1.
LaTeX source of the formulas on this page
\[ 18343 = 13 \times 17 \times 83 \]
18343 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 21168 |
| Euler totient φ(n) | 15744 |
| Square | 336465649 |
| Cube | 6171789399607 |
| Square root | 135.436332 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 167 |
| Scientific notation | 1.8343 × |
18343 in other forms
| Form | Value |
|---|---|
| In words | eighteen thousand three hundred and forty-three |
| Binary (base 2) | 100011110100111 |
| Octal (base 8) | 43647 |
| Hexadecimal (base 16) | 47A7 |
| Base 3 | 221011101 |
| As time | 18343 seconds = 5 h 5 min 43 s |
Is 18343 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 3) | 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 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 7) | 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 3) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 6) | 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 18343 a prime number?
No. 18343 = 13 × 17 × 83, so it is divisible by 13.
What are the factors of 18343?
1, 13, 17, 83, 221, 1079, 1411, 18343.
What is 18343 in binary?
100011110100111 (hexadecimal 47A7, octal 43647).
What is the square root of 18343?
About 135.4363.
Is 18343 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 18343?
It is a composite number with 8 divisors.