The number 10018
10018 is a composite number with 4 divisors. Its prime factorisation is 2 × 5009. Divisors (4): 1, 2, 5009, 10018.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 10018: a semiprime: 2 × 5009, the product of two primes.
- 2
10018 is composite. Its prime factorisation is
- 3
The divisors add up to 15030; without 10018 itself that is 5012, so 10018 is deficient (5012 is less than 10018). Euler's totient φ(10018) = 5008 numbers up to 10018 share no factor with it.
- 4
The digits of 10018 add up to 10, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 91 steps to reach 1.
LaTeX source of the formulas on this page
\[ 10018 = 2 \times 5009 \]
10018 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 15030 |
| Euler totient φ(n) | 5008 |
| Square | 100360324 |
| Cube | 1005409725832 |
| Square root | 100.089960 |
| Digit sum / digital root | 10 / 1 |
| Collatz steps to 1 | 91 |
| Scientific notation | 1.0018 × |
10018 in other forms
| Form | Value |
|---|---|
| In words | ten thousand and eighteen |
| Binary (base 2) | 10011100100010 |
| Octal (base 8) | 23442 |
| Hexadecimal (base 16) | 2722 |
| Base 3 | 111202001 |
| As time | 10018 seconds = 2 h 46 min 58 s |
Is 10018 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (10018 ÷ 2 = 5009) | 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 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 8) | 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 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 10018 a prime number?
No. 10018 = 2 × 5009, so it is divisible by 2.
What are the factors of 10018?
1, 2, 5009, 10018.
What is 10018 in binary?
10011100100010 (hexadecimal 2722, octal 23442).
What is the square root of 10018?
About 100.0900.
Is 10018 divisible by 3?
No. Its digits add up to 10, which is not a multiple of 3.
What is special about the number 10018?
10018 is a semiprime: 2 × 5009, the product of two primes.