The number 18071
18071 is a composite number with 4 divisors. Its prime factorisation is 17 × 1063. Divisors (4): 1, 17, 1063, 18071.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 18071: a Harshad number: divisible by its digit sum 17; a semiprime: 17 × 1063, the product of two primes.
- 2
18071 is composite. Its prime factorisation is
- 3
The divisors add up to 19152; without 18071 itself that is 1081, so 18071 is deficient (1081 is less than 18071). Euler's totient φ(18071) = 16992 numbers up to 18071 share no factor with it.
- 4
The digits of 18071 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 40 steps to reach 1.
LaTeX source of the formulas on this page
\[ 18071 = 17 \times 1063 \]
18071 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 19152 |
| Euler totient φ(n) | 16992 |
| Square | 326561041 |
| Cube | 5901284571911 |
| Square root | 134.428420 |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 40 |
| Scientific notation | 1.8071 × |
18071 in other forms
| Form | Value |
|---|---|
| In words | eighteen thousand and seventy-one |
| Binary (base 2) | 100011010010111 |
| Octal (base 8) | 43227 |
| Hexadecimal (base 16) | 4697 |
| Base 3 | 220210022 |
| As time | 18071 seconds = 5 h 1 min 11 s |
Is 18071 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 | No (remainder 2) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 3) | 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 | No (remainder 5) | 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 7) | 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 1) | 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 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 18071 a prime number?
No. 18071 = 17 × 1063, so it is divisible by 17.
What are the factors of 18071?
1, 17, 1063, 18071.
What is 18071 in binary?
100011010010111 (hexadecimal 4697, octal 43227).
What is the square root of 18071?
About 134.4284.
Is 18071 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 18071?
18071 is a Harshad number: divisible by its digit sum 17; a semiprime: 17 × 1063, the product of two primes.