21,498 in words
21,498
twenty-one thousand four hundred ninety-eight
21,498 is written twenty-one thousand four hundred ninety-eight.
Ways to write it
- As an ordinal
- twenty-one thousand four hundred ninety-eighth
- Expanded form
- 20,000 + 1,000 + 400 + 90 + 8
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 4 | 400 |
| tens | 9 | 90 |
| ones | 8 | 8 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 3, 6, 3,583, 7,166, 10,749 and 21,498 (8 factors)
- First 10 multiples
- 21,498, 42,996, 64,494, 85,992, 107,490, 128,988, 150,486, 171,984, 193,482, 214,980
- Square
- 21,498 × 21,498 = 462,164,004
- Square root
- ≈ 146.62
- Sum of the digits
- 2 + 1 + 4 + 9 + 8 = 24
- Rounded to the nearest 10
- 21,500
- Rounded to the nearest 100
- 21,500
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,497
- Number after
- 21,499
- In binary
101001111111010
Quick check
What number comes just after 21,498?
Show the answer
21,499
Is 21,498 even or odd?
Show the answer
Even
What is 21,498 + 10?
Show the answer
21,508
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 21,498 in words?
21,498 is written "twenty-one thousand four hundred ninety-eight".
Is 21,498 a prime number?
No. 21,498 is a composite number, because it has more than two factors.
What are the factors of 21,498?
The factors of 21,498 are 1, 2, 3, 6, 3,583, 7,166, 10,749 and 21,498.