The number 18082
18082 is a composite number with 4 divisors. Its prime factorisation is 2 × 9041. Divisors (4): 1, 2, 9041, 18082.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 18082: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 2 × 9041, the product of two primes.
- 2
18082 is composite. Its prime factorisation is
- 3
The divisors add up to 27126; without 18082 itself that is 9044, so 18082 is deficient (9044 is less than 18082). Euler's totient φ(18082) = 9040 numbers up to 18082 share no factor with it.
- 4
The digits of 18082 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 185 steps to reach 1.
LaTeX source of the formulas on this page
\[ 18082 = 2 \times 9041 \]
18082 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 27126 |
| Euler totient φ(n) | 9040 |
| Square | 326958724 |
| Cube | 5912067647368 |
| Square root | 134.469327 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 185 |
| Scientific notation | 1.8082 × |
18082 in other forms
| Form | Value |
|---|---|
| In words | eighteen thousand and eighty-two |
| Binary (base 2) | 100011010100010 |
| Octal (base 8) | 43242 |
| Hexadecimal (base 16) | 46A2 |
| Base 3 | 220210201 |
| As time | 18082 seconds = 5 h 1 min 22 s |
Is 18082 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (18082 ÷ 2 = 9041) | 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 1) | 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 1) | 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 9) | 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 18082 a prime number?
No. 18082 = 2 × 9041, so it is divisible by 2.
What are the factors of 18082?
1, 2, 9041, 18082.
What is 18082 in binary?
100011010100010 (hexadecimal 46A2, octal 43242).
What is the square root of 18082?
About 134.4693.
Is 18082 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 18082?
18082 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 2 × 9041, the product of two primes.