21,329 in words
21,329
twenty-one thousand three hundred twenty-nine
21,329 is written twenty-one thousand three hundred twenty-nine.
Ways to write it
- As an ordinal
- twenty-one thousand three hundred twenty-ninth
- Expanded form
- 20,000 + 1,000 + 300 + 20 + 9
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 3 | 300 |
| tens | 2 | 20 |
| ones | 9 | 9 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 7, 11, 77, 277, 1,939, 3,047 and 21,329 (8 factors)
- First 10 multiples
- 21,329, 42,658, 63,987, 85,316, 106,645, 127,974, 149,303, 170,632, 191,961, 213,290
- Square
- 21,329 × 21,329 = 454,926,241
- Square root
- ≈ 146.04
- Sum of the digits
- 2 + 1 + 3 + 2 + 9 = 17
- Rounded to the nearest 10
- 21,330
- Rounded to the nearest 100
- 21,300
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,328
- Number after
- 21,330
- In binary
101001101010001
Quick check
What number comes just after 21,329?
Show the answer
21,330
Is 21,329 even or odd?
Show the answer
Odd
What is 21,329 + 10?
Show the answer
21,339
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 21,329 in words?
21,329 is written "twenty-one thousand three hundred twenty-nine".
Is 21,329 a prime number?
No. 21,329 is a composite number, because it has more than two factors.
What are the factors of 21,329?
The factors of 21,329 are 1, 7, 11, 77, 277, 1,939, 3,047 and 21,329.