21,017 in words
21,017
twenty-one thousand seventeen
21,017 is written twenty-one thousand seventeen.
Ways to write it
- As an ordinal
- twenty-one thousand seventeenth
- Expanded form
- 20,000 + 1,000 + 10 + 7
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 0 | 0 |
| tens | 1 | 10 |
| ones | 7 | 7 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Prime
- Factors
- 1 and 21,017 (2 factors)
- First 10 multiples
- 21,017, 42,034, 63,051, 84,068, 105,085, 126,102, 147,119, 168,136, 189,153, 210,170
- Square
- 21,017 × 21,017 = 441,714,289
- Square root
- ≈ 144.97
- Sum of the digits
- 2 + 1 + 0 + 1 + 7 = 11
- Rounded to the nearest 10
- 21,020
- Rounded to the nearest 100
- 21,000
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,016
- Number after
- 21,018
- In binary
101001000011001
Quick check
What number comes just after 21,017?
Show the answer
21,018
Is 21,017 even or odd?
Show the answer
Odd
What is 21,017 + 10?
Show the answer
21,027
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 21,017 in words?
21,017 is written "twenty-one thousand seventeen".
Is 21,017 a prime number?
Yes. 21,017 is a prime number: its only factors are 1 and 21,017.
What are the factors of 21,017?
The factors of 21,017 are 1 and 21,017.