The number 16018
16018 is a composite number with 4 divisors. Its prime factorisation is 2 × 8009. Divisors (4): 1, 2, 8009, 16018.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 16018: a semiprime: 2 × 8009, the product of two primes.
- 2
16018 is composite. Its prime factorisation is
- 3
The divisors add up to 24030; without 16018 itself that is 8012, so 16018 is deficient (8012 is less than 16018). Euler's totient φ(16018) = 8008 numbers up to 16018 share no factor with it.
- 4
The digits of 16018 add up to 16, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 45 steps to reach 1.
LaTeX source of the formulas on this page
\[ 16018 = 2 \times 8009 \]
16018 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 24030 |
| Euler totient φ(n) | 8008 |
| Square | 256576324 |
| Cube | 4109839557832 |
| Square root | 126.562238 |
| Digit sum / digital root | 16 / 7 |
| Collatz steps to 1 | 45 |
| Scientific notation | 1.6018 × |
16018 in other forms
| Form | Value |
|---|---|
| In words | sixteen thousand and eighteen |
| Binary (base 2) | 11111010010010 |
| Octal (base 8) | 37222 |
| Hexadecimal (base 16) | 3E92 |
| Base 3 | 210222021 |
| As time | 16018 seconds = 4 h 26 min 58 s |
Is 16018 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (16018 ÷ 2 = 8009) | 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 3) | 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 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 7) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 8) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 2) | 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 16018 a prime number?
No. 16018 = 2 × 8009, so it is divisible by 2.
What are the factors of 16018?
1, 2, 8009, 16018.
What is 16018 in binary?
11111010010010 (hexadecimal 3E92, octal 37222).
What is the square root of 16018?
About 126.5622.
Is 16018 divisible by 3?
No. Its digits add up to 16, which is not a multiple of 3.
What is special about the number 16018?
16018 is a semiprime: 2 × 8009, the product of two primes.