The number 18426
18426 is a composite number with 16 divisors. Its prime factorisation is 2 × 3 × 37 × 83. Divisors (16): 1, 2, 3, 6, 37, 74, 83, 111, 166, 222, 249, 498, 3071, 6142, 9213, 18426.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
18426 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
18426 is composite. Its prime factorisation is
- 3
The divisors add up to 38304; without 18426 itself that is 19878, so 18426 is abundant (19878 is more than 18426). Euler's totient φ(18426) = 5904 numbers up to 18426 share no factor with it.
- 4
The digits of 18426 add up to 21, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 61 steps to reach 1.
LaTeX source of the formulas on this page
\[ 18426 = 2 \times 3 \times 37 \times 83 \]
18426 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 38304 |
| Euler totient φ(n) | 5904 |
| Square | 339517476 |
| Cube | 6255949012776 |
| Square root | 135.742403 |
| Digit sum / digital root | 21 / 3 |
| Collatz steps to 1 | 61 |
| Scientific notation | 1.8426 × |
18426 in other forms
| Form | Value |
|---|---|
| In words | eighteen thousand four hundred and twenty-six |
| Binary (base 2) | 100011111111010 |
| Octal (base 8) | 43772 |
| Hexadecimal (base 16) | 47FA |
| Base 3 | 221021110 |
| As time | 18426 seconds = 5 h 7 min 6 s |
Is 18426 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (18426 ÷ 2 = 9213) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (18426 ÷ 3 = 6142) | 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 1) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | Yes (18426 ÷ 6 = 3071) | 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 2) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 3) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 6) | 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 6) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 18426 a prime number?
No. 18426 = 2 × 3 × 37 × 83, so it is divisible by 2.
What are the factors of 18426?
1, 2, 3, 6, 37, 74, 83, 111, 166, 222, 249, 498, 3071, 6142, 9213, 18426.
What is 18426 in binary?
100011111111010 (hexadecimal 47FA, octal 43772).
What is the square root of 18426?
About 135.7424.
Is 18426 divisible by 3?
Yes. Its digits add up to 21, a multiple of 3.
What is special about the number 18426?
It is a composite number with 16 divisors.