21,743 in words
21,743
twenty-one thousand seven hundred forty-three
21,743 is written twenty-one thousand seven hundred forty-three.
Ways to write it
- As an ordinal
- twenty-one thousand seven hundred forty-third
- Expanded form
- 20,000 + 1,000 + 700 + 40 + 3
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 7 | 700 |
| tens | 4 | 40 |
| ones | 3 | 3 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 17, 1,279 and 21,743 (4 factors)
- First 10 multiples
- 21,743, 43,486, 65,229, 86,972, 108,715, 130,458, 152,201, 173,944, 195,687, 217,430
- Square
- 21,743 × 21,743 = 472,758,049
- Square root
- ≈ 147.46
- Sum of the digits
- 2 + 1 + 7 + 4 + 3 = 17
- Rounded to the nearest 10
- 21,740
- Rounded to the nearest 100
- 21,700
- Rounded to the nearest 1000
- 22,000
- Number before
- 21,742
- Number after
- 21,744
- In binary
101010011101111
Quick check
What number comes just after 21,743?
Show the answer
21,744
Is 21,743 even or odd?
Show the answer
Odd
What is 21,743 + 10?
Show the answer
21,753
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 21,743 in words?
21,743 is written "twenty-one thousand seven hundred forty-three".
Is 21,743 a prime number?
No. 21,743 is a composite number, because it has more than two factors.
What are the factors of 21,743?
The factors of 21,743 are 1, 17, 1,279 and 21,743.