21,164 in words
21,164
twenty-one thousand one hundred sixty-four
21,164 is written twenty-one thousand one hundred sixty-four.
Ways to write it
- As an ordinal
- twenty-one thousand one hundred sixty-fourth
- Expanded form
- 20,000 + 1,000 + 100 + 60 + 4
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 1 | 100 |
| tens | 6 | 60 |
| ones | 4 | 4 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 4, 11, 13, 22, 26, 37, 44, 52, 74, 143, 148, 286, 407, 481, 572, 814, 962, 1,628, 1,924, 5,291, 10,582 and 21,164 (24 factors)
- First 10 multiples
- 21,164, 42,328, 63,492, 84,656, 105,820, 126,984, 148,148, 169,312, 190,476, 211,640
- Square
- 21,164 × 21,164 = 447,914,896
- Square root
- ≈ 145.48
- Sum of the digits
- 2 + 1 + 1 + 6 + 4 = 14
- Rounded to the nearest 10
- 21,160
- Rounded to the nearest 100
- 21,200
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,163
- Number after
- 21,165
- In binary
101001010101100
Quick check
What number comes just after 21,164?
Show the answer
21,165
Is 21,164 even or odd?
Show the answer
Even
What is 21,164 + 10?
Show the answer
21,174
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 21,164 in words?
21,164 is written "twenty-one thousand one hundred sixty-four".
Is 21,164 a prime number?
No. 21,164 is a composite number, because it has more than two factors.
What are the factors of 21,164?
The factors of 21,164 are 1, 2, 4, 11, 13, 22, 26, 37, 44, 52, 74, 143, 148, 286, 407, 481, 572, 814, 962, 1,628, 1,924, 5,291, 10,582 and 21,164.