21,400 in words
21,400
twenty-one thousand four hundred
21,400 is written twenty-one thousand four hundred.
Ways to write it
- As an ordinal
- twenty-one thousand four hundredth
- Expanded form
- 20,000 + 1,000 + 400
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 4 | 400 |
| tens | 0 | 0 |
| ones | 0 | 0 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 107, 200, 214, 428, 535, 856, 1,070, 2,140, 2,675, 4,280, 5,350, 10,700 and 21,400 (24 factors)
- First 10 multiples
- 21,400, 42,800, 64,200, 85,600, 107,000, 128,400, 149,800, 171,200, 192,600, 214,000
- Square
- 21,400 × 21,400 = 457,960,000
- Square root
- ≈ 146.29
- Sum of the digits
- 2 + 1 + 4 + 0 + 0 = 7
- Rounded to the nearest 10
- 21,400
- Rounded to the nearest 100
- 21,400
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,399
- Number after
- 21,401
- In binary
101001110011000
Quick check
What number comes just after 21,400?
Show the answer
21,401
Is 21,400 even or odd?
Show the answer
Even
What is 21,400 + 10?
Show the answer
21,410
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 21,400 in words?
21,400 is written "twenty-one thousand four hundred".
Is 21,400 a prime number?
No. 21,400 is a composite number, because it has more than two factors.
What are the factors of 21,400?
The factors of 21,400 are 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 107, 200, 214, 428, 535, 856, 1,070, 2,140, 2,675, 4,280, 5,350, 10,700 and 21,400.