20,021 in words
20,021
twenty thousand twenty-one
20,021 is written twenty thousand twenty-one.
Ways to write it
- As an ordinal
- twenty thousand twenty-first
- Expanded form
- 20,000 + 20 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 0 | 0 |
| hundreds | 0 | 0 |
| tens | 2 | 20 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Prime
- Factors
- 1 and 20,021 (2 factors)
- First 10 multiples
- 20,021, 40,042, 60,063, 80,084, 100,105, 120,126, 140,147, 160,168, 180,189, 200,210
- Square
- 20,021 × 20,021 = 400,840,441
- Square root
- ≈ 141.50
- Sum of the digits
- 2 + 0 + 0 + 2 + 1 = 5
- Rounded to the nearest 10
- 20,020
- Rounded to the nearest 100
- 20,000
- Rounded to the nearest 1000
- 20,000
- Number before
- 20,020
- Number after
- 20,022
- In binary
100111000110101
Quick check
What number comes just after 20,021?
Show the answer
20,022
Is 20,021 even or odd?
Show the answer
Odd
What is 20,021 + 10?
Show the answer
20,031
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 20,021 in words?
20,021 is written "twenty thousand twenty-one".
Is 20,021 a prime number?
Yes. 20,021 is a prime number: its only factors are 1 and 20,021.
What are the factors of 20,021?
The factors of 20,021 are 1 and 20,021.