The number 18422
18422 is a composite number with 8 divisors. Its prime factorisation is 2 × 61 × 151. Divisors (8): 1, 2, 61, 122, 151, 302, 9211, 18422.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
18422 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
18422 is composite. Its prime factorisation is
- 3
The divisors add up to 28272; without 18422 itself that is 9850, so 18422 is deficient (9850 is less than 18422). Euler's totient φ(18422) = 9000 numbers up to 18422 share no factor with it.
- 4
The digits of 18422 add up to 17, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 123 steps to reach 1.
LaTeX source of the formulas on this page
\[ 18422 = 2 \times 61 \times 151 \]
18422 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 28272 |
| Euler totient φ(n) | 9000 |
| Square | 339370084 |
| Cube | 6251875687448 |
| Square root | 135.727669 |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 123 |
| Scientific notation | 1.8422 × |
18422 in other forms
| Form | Value |
|---|---|
| In words | eighteen thousand four hundred and twenty-two |
| Binary (base 2) | 100011111110110 |
| Octal (base 8) | 43766 |
| Hexadecimal (base 16) | 47F6 |
| Base 3 | 221021022 |
| As time | 18422 seconds = 5 h 7 min 2 s |
Is 18422 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (18422 ÷ 2 = 9211) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 2) | 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 2) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 2) | 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 6) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 8) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 2) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 8) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 18422 a prime number?
No. 18422 = 2 × 61 × 151, so it is divisible by 2.
What are the factors of 18422?
1, 2, 61, 122, 151, 302, 9211, 18422.
What is 18422 in binary?
100011111110110 (hexadecimal 47F6, octal 43766).
What is the square root of 18422?
About 135.7277.
Is 18422 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 18422?
It is a composite number with 8 divisors.