21,140 in words
21,140
twenty-one thousand one hundred and forty
21,140 is written twenty-one thousand one hundred and forty.
Ways to write it
- As an ordinal
- twenty-one thousand one hundred and fortieth
- Expanded form
- 20,000 + 1,000 + 100 + 40
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 1 | 100 |
| tens | 4 | 40 |
| ones | 0 | 0 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 151, 302, 604, 755, 1,057, 1,510, 2,114, 3,020, 4,228, 5,285, 10,570 and 21,140 (24 factors)
- First 10 multiples
- 21,140, 42,280, 63,420, 84,560, 105,700, 126,840, 147,980, 169,120, 190,260, 211,400
- Square
- 21,140 × 21,140 = 446,899,600
- Square root
- ≈ 145.40
- Sum of the digits
- 2 + 1 + 1 + 4 + 0 = 8
- Rounded to the nearest 10
- 21,140
- Rounded to the nearest 100
- 21,100
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,139
- Number after
- 21,141
- In binary
101001010010100
Quick check
What number comes just after 21,140?
Show the answer
21,141
Is 21,140 even or odd?
Show the answer
Even
What is 21,140 + 10?
Show the answer
21,150
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 21,140 in words?
21,140 is written "twenty-one thousand one hundred and forty".
Is 21,140 a prime number?
No. 21,140 is a composite number, because it has more than two factors.
What are the factors of 21,140?
The factors of 21,140 are 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 151, 302, 604, 755, 1,057, 1,510, 2,114, 3,020, 4,228, 5,285, 10,570 and 21,140.