The number 19550
19550 is a composite number with 24 divisors. Its prime factorisation is 2 × × 17 × 23. Divisors (24): 1, 2, 5, 10, 17, 23, 25, 34, 46, 50, 85, 115, 170, 230, 391, 425 … 19550.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
19550 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
19550 is composite. Its prime factorisation is
- 3
The divisors add up to 40176; without 19550 itself that is 20626, so 19550 is abundant (20626 is more than 19550). Euler's totient φ(19550) = 7040 numbers up to 19550 share no factor with it.
- 4
The digits of 19550 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 154 steps to reach 1.
LaTeX source of the formulas on this page
\[ 19550 = 2 \times 5^{2} \times 17 \times 23 \]19550 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 24 |
| Sum of divisors | 40176 |
| Euler totient φ(n) | 7040 |
| Square | 382202500 |
| Cube | 7472058875000 |
| Square root | 139.821315 (= 5√782) |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 154 |
| Scientific notation | 1.955 × |
19550 in other forms
| Form | Value |
|---|---|
| In words | nineteen thousand five hundred and fifty |
| Binary (base 2) | 100110001011110 |
| Octal (base 8) | 46136 |
| Hexadecimal (base 16) | 4C5E |
| Base 3 | 222211002 |
| As time | 19550 seconds = 5 h 25 min 50 s |
Is 19550 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (19550 ÷ 2 = 9775) | 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 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (19550 ÷ 5 = 3910) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 2) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 6) | 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 2) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (19550 ÷ 10 = 1955) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 3) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 19550 a prime number?
No. 19550 = 2 × × 17 × 23, so it is divisible by 2.
What are the factors of 19550?
1, 2, 5, 10, 17, 23, 25, 34, 46, 50, 85, 115, 170, 230, 391, 425, 575, 782, 850, 1150, 1955, 3910, 9775, 19550.
What is 19550 in binary?
100110001011110 (hexadecimal 4C5E, octal 46136).
What is the square root of 19550?
About 139.8213, exactly 5√782.
Is 19550 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 19550?
It is a composite number with 24 divisors.