21,049 in words
21,049
twenty-one thousand and forty-nine
21,049 is written twenty-one thousand and forty-nine.
Ways to write it
- As an ordinal
- twenty-one thousand and forty-ninth
- Expanded form
- 20,000 + 1,000 + 40 + 9
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 0 | 0 |
| tens | 4 | 40 |
| ones | 9 | 9 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 7, 31, 97, 217, 679, 3,007 and 21,049 (8 factors)
- First 10 multiples
- 21,049, 42,098, 63,147, 84,196, 105,245, 126,294, 147,343, 168,392, 189,441, 210,490
- Square
- 21,049 × 21,049 = 443,060,401
- Square root
- ≈ 145.08
- Sum of the digits
- 2 + 1 + 0 + 4 + 9 = 16
- Rounded to the nearest 10
- 21,050
- Rounded to the nearest 100
- 21,000
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,048
- Number after
- 21,050
- In binary
101001000111001
Quick check
What number comes just after 21,049?
Show the answer
21,050
Is 21,049 even or odd?
Show the answer
Odd
What is 21,049 + 10?
Show the answer
21,059
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 21,049 in words?
21,049 is written "twenty-one thousand and forty-nine".
Is 21,049 a prime number?
No. 21,049 is a composite number, because it has more than two factors.
What are the factors of 21,049?
The factors of 21,049 are 1, 7, 31, 97, 217, 679, 3,007 and 21,049.