21,088 in words
21,088
twenty-one thousand and eighty-eight
21,088 is written twenty-one thousand and eighty-eight.
Ways to write it
- As an ordinal
- twenty-one thousand and eighty-eighth
- Expanded form
- 20,000 + 1,000 + 80 + 8
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 0 | 0 |
| tens | 8 | 80 |
| ones | 8 | 8 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 4, 8, 16, 32, 659, 1,318, 2,636, 5,272, 10,544 and 21,088 (12 factors)
- First 10 multiples
- 21,088, 42,176, 63,264, 84,352, 105,440, 126,528, 147,616, 168,704, 189,792, 210,880
- Square
- 21,088 × 21,088 = 444,703,744
- Square root
- ≈ 145.22
- Sum of the digits
- 2 + 1 + 0 + 8 + 8 = 19
- Rounded to the nearest 10
- 21,090
- Rounded to the nearest 100
- 21,100
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,087
- Number after
- 21,089
- In binary
101001001100000
Quick check
What number comes just after 21,088?
Show the answer
21,089
Is 21,088 even or odd?
Show the answer
Even
What is 21,088 + 10?
Show the answer
21,098
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 21,088 in words?
21,088 is written "twenty-one thousand and eighty-eight".
Is 21,088 a prime number?
No. 21,088 is a composite number, because it has more than two factors.
What are the factors of 21,088?
The factors of 21,088 are 1, 2, 4, 8, 16, 32, 659, 1,318, 2,636, 5,272, 10,544 and 21,088.