The number 18429
18429 is a composite number with 4 divisors. Its prime factorisation is 3 × 6143. Divisors (4): 1, 3, 6143, 18429.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 18429: a semiprime: 3 × 6143, the product of two primes.
- 2
18429 is composite. Its prime factorisation is
- 3
The divisors add up to 24576; without 18429 itself that is 6147, so 18429 is deficient (6147 is less than 18429). Euler's totient φ(18429) = 12284 numbers up to 18429 share no factor with it.
- 4
The digits of 18429 add up to 24, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 154 steps to reach 1.
LaTeX source of the formulas on this page
\[ 18429 = 3 \times 6143 \]
18429 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 24576 |
| Euler totient φ(n) | 12284 |
| Square | 339628041 |
| Cube | 6259005167589 |
| Square root | 135.753453 |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 154 |
| Scientific notation | 1.8429 × |
18429 in other forms
| Form | Value |
|---|---|
| In words | eighteen thousand four hundred and twenty-nine |
| Binary (base 2) | 100011111111101 |
| Octal (base 8) | 43775 |
| Hexadecimal (base 16) | 47FD |
| Base 3 | 221021120 |
| As time | 18429 seconds = 5 h 7 min 9 s |
Is 18429 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 | Yes (18429 ÷ 3 = 6143) | 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 3) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 5) | 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 6) | 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 4) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 9) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 18429 a prime number?
No. 18429 = 3 × 6143, so it is divisible by 3.
What are the factors of 18429?
1, 3, 6143, 18429.
What is 18429 in binary?
100011111111101 (hexadecimal 47FD, octal 43775).
What is the square root of 18429?
About 135.7535.
Is 18429 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 18429?
18429 is a semiprime: 3 × 6143, the product of two primes.