21,667 in words
21,667
twenty-one thousand six hundred sixty-seven
21,667 is written twenty-one thousand six hundred sixty-seven.
Ways to write it
- As an ordinal
- twenty-one thousand six hundred sixty-seventh
- Expanded form
- 20,000 + 1,000 + 600 + 60 + 7
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 6 | 600 |
| tens | 6 | 60 |
| ones | 7 | 7 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 47, 461 and 21,667 (4 factors)
- First 10 multiples
- 21,667, 43,334, 65,001, 86,668, 108,335, 130,002, 151,669, 173,336, 195,003, 216,670
- Square
- 21,667 × 21,667 = 469,458,889
- Square root
- ≈ 147.20
- Sum of the digits
- 2 + 1 + 6 + 6 + 7 = 22
- Rounded to the nearest 10
- 21,670
- Rounded to the nearest 100
- 21,700
- Rounded to the nearest 1000
- 22,000
- Number before
- 21,666
- Number after
- 21,668
- In binary
101010010100011
Quick check
What number comes just after 21,667?
Show the answer
21,668
Is 21,667 even or odd?
Show the answer
Odd
What is 21,667 + 10?
Show the answer
21,677
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 21,667 in words?
21,667 is written "twenty-one thousand six hundred sixty-seven".
Is 21,667 a prime number?
No. 21,667 is a composite number, because it has more than two factors.
What are the factors of 21,667?
The factors of 21,667 are 1, 47, 461 and 21,667.