The number 18022
18022 is a composite number with 4 divisors. Its prime factorisation is 2 × 9011. Divisors (4): 1, 2, 9011, 18022.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 18022: a semiprime: 2 × 9011, the product of two primes.
- 2
18022 is composite. Its prime factorisation is
- 3
The divisors add up to 27036; without 18022 itself that is 9014, so 18022 is deficient (9014 is less than 18022). Euler's totient φ(18022) = 9010 numbers up to 18022 share no factor with it.
- 4
The digits of 18022 add up to 13, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 40 steps to reach 1.
LaTeX source of the formulas on this page
\[ 18022 = 2 \times 9011 \]
18022 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 27036 |
| Euler totient φ(n) | 9010 |
| Square | 324792484 |
| Cube | 5853410146648 |
| Square root | 134.246043 |
| Digit sum / digital root | 13 / 4 |
| Collatz steps to 1 | 40 |
| Scientific notation | 1.8022 × |
18022 in other forms
| Form | Value |
|---|---|
| In words | eighteen thousand and twenty-two |
| Binary (base 2) | 100011001100110 |
| Octal (base 8) | 43146 |
| Hexadecimal (base 16) | 4666 |
| Base 3 | 220201111 |
| As time | 18022 seconds = 5 h 0 min 22 s |
Is 18022 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (18022 ÷ 2 = 9011) | 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 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 4) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 4) | 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 4) | 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 4) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 18022 a prime number?
No. 18022 = 2 × 9011, so it is divisible by 2.
What are the factors of 18022?
1, 2, 9011, 18022.
What is 18022 in binary?
100011001100110 (hexadecimal 4666, octal 43146).
What is the square root of 18022?
About 134.2460.
Is 18022 divisible by 3?
No. Its digits add up to 13, which is not a multiple of 3.
What is special about the number 18022?
18022 is a semiprime: 2 × 9011, the product of two primes.