21,427 in words
21,427
twenty-one thousand four hundred twenty-seven
21,427 is written twenty-one thousand four hundred twenty-seven.
Ways to write it
- As an ordinal
- twenty-one thousand four hundred twenty-seventh
- Expanded form
- 20,000 + 1,000 + 400 + 20 + 7
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 4 | 400 |
| tens | 2 | 20 |
| ones | 7 | 7 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 7, 3,061 and 21,427 (4 factors)
- First 10 multiples
- 21,427, 42,854, 64,281, 85,708, 107,135, 128,562, 149,989, 171,416, 192,843, 214,270
- Square
- 21,427 × 21,427 = 459,116,329
- Square root
- ≈ 146.38
- Sum of the digits
- 2 + 1 + 4 + 2 + 7 = 16
- Rounded to the nearest 10
- 21,430
- Rounded to the nearest 100
- 21,400
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,426
- Number after
- 21,428
- In binary
101001110110011
Quick check
What number comes just after 21,427?
Show the answer
21,428
Is 21,427 even or odd?
Show the answer
Odd
What is 21,427 + 10?
Show the answer
21,437
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 21,427 in words?
21,427 is written "twenty-one thousand four hundred twenty-seven".
Is 21,427 a prime number?
No. 21,427 is a composite number, because it has more than two factors.
What are the factors of 21,427?
The factors of 21,427 are 1, 7, 3,061 and 21,427.