21,013 in words
21,013
twenty-one thousand and thirteen
21,013 is written twenty-one thousand and thirteen.
Ways to write it
- As an ordinal
- twenty-one thousand and thirteenth
- Expanded form
- 20,000 + 1,000 + 10 + 3
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 0 | 0 |
| tens | 1 | 10 |
| ones | 3 | 3 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Prime
- Factors
- 1 and 21,013 (2 factors)
- First 10 multiples
- 21,013, 42,026, 63,039, 84,052, 105,065, 126,078, 147,091, 168,104, 189,117, 210,130
- Square
- 21,013 × 21,013 = 441,546,169
- Square root
- ≈ 144.96
- Sum of the digits
- 2 + 1 + 0 + 1 + 3 = 7
- Rounded to the nearest 10
- 21,010
- Rounded to the nearest 100
- 21,000
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,012
- Number after
- 21,014
- In binary
101001000010101
Quick check
What number comes just after 21,013?
Show the answer
21,014
Is 21,013 even or odd?
Show the answer
Odd
What is 21,013 + 10?
Show the answer
21,023
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 21,013 in words?
21,013 is written "twenty-one thousand and thirteen".
Is 21,013 a prime number?
Yes. 21,013 is a prime number: its only factors are 1 and 21,013.
What are the factors of 21,013?
The factors of 21,013 are 1 and 21,013.