21,024 in words
21,024
twenty-one thousand twenty-four
21,024 is written twenty-one thousand twenty-four.
Ways to write it
- As an ordinal
- twenty-one thousand twenty-fourth
- Expanded form
- 20,000 + 1,000 + 20 + 4
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 0 | 0 |
| tens | 2 | 20 |
| ones | 4 | 4 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 72, 73, 96, 144, 146, 219, 288, 292, 438, 584, 657, 876, 1,168, 1,314, 1,752, 2,336, 2,628, 3,504, 5,256, 7,008, 10,512 and 21,024 (36 factors)
- First 10 multiples
- 21,024, 42,048, 63,072, 84,096, 105,120, 126,144, 147,168, 168,192, 189,216, 210,240
- Square
- 21,024 × 21,024 = 442,008,576
- Square root
- ≈ 145.00
- Sum of the digits
- 2 + 1 + 0 + 2 + 4 = 9
- Rounded to the nearest 10
- 21,020
- Rounded to the nearest 100
- 21,000
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,023
- Number after
- 21,025
- In binary
101001000100000
Quick check
What number comes just after 21,024?
Show the answer
21,025
Is 21,024 even or odd?
Show the answer
Even
What is 21,024 + 10?
Show the answer
21,034
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 21,024 in words?
21,024 is written "twenty-one thousand twenty-four".
Is 21,024 a prime number?
No. 21,024 is a composite number, because it has more than two factors.
What are the factors of 21,024?
The factors of 21,024 are 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 72, 73, 96, 144, 146, 219, 288, 292, 438, 584, 657, 876, 1,168, 1,314, 1,752, 2,336, 2,628, 3,504, 5,256, 7,008, 10,512 and 21,024.