21,029 in words
21,029
twenty-one thousand and twenty-nine
21,029 is written twenty-one thousand and twenty-nine.
Ways to write it
- As an ordinal
- twenty-one thousand and twenty-ninth
- Expanded form
- 20,000 + 1,000 + 20 + 9
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 0 | 0 |
| tens | 2 | 20 |
| ones | 9 | 9 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 17, 1,237 and 21,029 (4 factors)
- First 10 multiples
- 21,029, 42,058, 63,087, 84,116, 105,145, 126,174, 147,203, 168,232, 189,261, 210,290
- Square
- 21,029 × 21,029 = 442,218,841
- Square root
- ≈ 145.01
- Sum of the digits
- 2 + 1 + 0 + 2 + 9 = 14
- Rounded to the nearest 10
- 21,030
- Rounded to the nearest 100
- 21,000
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,028
- Number after
- 21,030
- In binary
101001000100101
Quick check
What number comes just after 21,029?
Show the answer
21,030
Is 21,029 even or odd?
Show the answer
Odd
What is 21,029 + 10?
Show the answer
21,039
Practise 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 21,029 in words?
21,029 is written "twenty-one thousand and twenty-nine".
Is 21,029 a prime number?
No. 21,029 is a composite number, because it has more than two factors.
What are the factors of 21,029?
The factors of 21,029 are 1, 17, 1,237 and 21,029.