21,740 in words
21,740
twenty-one thousand seven hundred forty
21,740 is written twenty-one thousand seven hundred forty.
Ways to write it
- As an ordinal
- twenty-one thousand seven hundred fortieth
- Expanded form
- 20,000 + 1,000 + 700 + 40
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 7 | 700 |
| tens | 4 | 40 |
| ones | 0 | 0 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 4, 5, 10, 20, 1,087, 2,174, 4,348, 5,435, 10,870 and 21,740 (12 factors)
- First 10 multiples
- 21,740, 43,480, 65,220, 86,960, 108,700, 130,440, 152,180, 173,920, 195,660, 217,400
- Square
- 21,740 × 21,740 = 472,627,600
- Square root
- ≈ 147.44
- Sum of the digits
- 2 + 1 + 7 + 4 + 0 = 14
- Rounded to the nearest 10
- 21,740
- Rounded to the nearest 100
- 21,700
- Rounded to the nearest 1000
- 22,000
- Number before
- 21,739
- Number after
- 21,741
- In binary
101010011101100
Quick check
What number comes just after 21,740?
Show the answer
21,741
Is 21,740 even or odd?
Show the answer
Even
What is 21,740 + 10?
Show the answer
21,750
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 21,740 in words?
21,740 is written "twenty-one thousand seven hundred forty".
Is 21,740 a prime number?
No. 21,740 is a composite number, because it has more than two factors.
What are the factors of 21,740?
The factors of 21,740 are 1, 2, 4, 5, 10, 20, 1,087, 2,174, 4,348, 5,435, 10,870 and 21,740.