21,764 in words
21,764
twenty-one thousand seven hundred sixty-four
21,764 is written twenty-one thousand seven hundred sixty-four.
Ways to write it
- As an ordinal
- twenty-one thousand seven hundred sixty-fourth
- Expanded form
- 20,000 + 1,000 + 700 + 60 + 4
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 7 | 700 |
| tens | 6 | 60 |
| ones | 4 | 4 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 4, 5,441, 10,882 and 21,764 (6 factors)
- First 10 multiples
- 21,764, 43,528, 65,292, 87,056, 108,820, 130,584, 152,348, 174,112, 195,876, 217,640
- Square
- 21,764 × 21,764 = 473,671,696
- Square root
- ≈ 147.53
- Sum of the digits
- 2 + 1 + 7 + 6 + 4 = 20
- Rounded to the nearest 10
- 21,760
- Rounded to the nearest 100
- 21,800
- Rounded to the nearest 1000
- 22,000
- Number before
- 21,763
- Number after
- 21,765
- In binary
101010100000100
Quick check
What number comes just after 21,764?
Show the answer
21,765
Is 21,764 even or odd?
Show the answer
Even
What is 21,764 + 10?
Show the answer
21,774
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 21,764 in words?
21,764 is written "twenty-one thousand seven hundred sixty-four".
Is 21,764 a prime number?
No. 21,764 is a composite number, because it has more than two factors.
What are the factors of 21,764?
The factors of 21,764 are 1, 2, 4, 5,441, 10,882 and 21,764.