21,443 in words
21,443
twenty-one thousand four hundred forty-three
21,443 is written twenty-one thousand four hundred forty-three.
Ways to write it
- As an ordinal
- twenty-one thousand four hundred forty-third
- Expanded form
- 20,000 + 1,000 + 400 + 40 + 3
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 4 | 400 |
| tens | 4 | 40 |
| ones | 3 | 3 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 41, 523 and 21,443 (4 factors)
- First 10 multiples
- 21,443, 42,886, 64,329, 85,772, 107,215, 128,658, 150,101, 171,544, 192,987, 214,430
- Square
- 21,443 × 21,443 = 459,802,249
- Square root
- ≈ 146.43
- Sum of the digits
- 2 + 1 + 4 + 4 + 3 = 14
- Rounded to the nearest 10
- 21,440
- Rounded to the nearest 100
- 21,400
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,442
- Number after
- 21,444
- In binary
101001111000011
Quick check
What number comes just after 21,443?
Show the answer
21,444
Is 21,443 even or odd?
Show the answer
Odd
What is 21,443 + 10?
Show the answer
21,453
Practice 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 21,443 in words?
21,443 is written "twenty-one thousand four hundred forty-three".
Is 21,443 a prime number?
No. 21,443 is a composite number, because it has more than two factors.
What are the factors of 21,443?
The factors of 21,443 are 1, 41, 523 and 21,443.