18,009 in words
18,009
eighteen thousand nine
18,009 is written eighteen thousand nine.
Ways to write it
- As an ordinal
- eighteen thousand ninth
- Expanded form
- 10,000 + 8,000 + 9
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 1 | 10,000 |
| thousands | 8 | 8,000 |
| hundreds | 0 | 0 |
| tens | 0 | 0 |
| ones | 9 | 9 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 3, 9, 23, 27, 29, 69, 87, 207, 261, 621, 667, 783, 2,001, 6,003 and 18,009 (16 factors)
- First 10 multiples
- 18,009, 36,018, 54,027, 72,036, 90,045, 108,054, 126,063, 144,072, 162,081, 180,090
- Square
- 18,009 × 18,009 = 324,324,081
- Square root
- ≈ 134.20
- Sum of the digits
- 1 + 8 + 0 + 0 + 9 = 18
- Rounded to the nearest 10
- 18,010
- Rounded to the nearest 100
- 18,000
- Rounded to the nearest 1000
- 18,000
- Number before
- 18,008
- Number after
- 18,010
- In binary
100011001011001
Quick check
What number comes just after 18,009?
Show the answer
18,010
Is 18,009 even or odd?
Show the answer
Odd
What is 18,009 + 10?
Show the answer
18,019
Practice with a game
Factors, Multiples & Primes
Multiples, factors, prime numbers, square numbers and prime factors.
Number Patterns
Find the missing number in a sequence.Frequently asked questions
How do you write 18,009 in words?
18,009 is written "eighteen thousand nine".
Is 18,009 a prime number?
No. 18,009 is a composite number, because it has more than two factors.
What are the factors of 18,009?
The factors of 18,009 are 1, 3, 9, 23, 27, 29, 69, 87, 207, 261, 621, 667, 783, 2,001, 6,003 and 18,009.