20,001 in words
20,001
twenty thousand one
20,001 is written twenty thousand one.
Ways to write it
- As an ordinal
- twenty thousand first
- Expanded form
- 20,000 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 0 | 0 |
| hundreds | 0 | 0 |
| tens | 0 | 0 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 3, 59, 113, 177, 339, 6,667 and 20,001 (8 factors)
- First 10 multiples
- 20,001, 40,002, 60,003, 80,004, 100,005, 120,006, 140,007, 160,008, 180,009, 200,010
- Square
- 20,001 × 20,001 = 400,040,001
- Square root
- ≈ 141.42
- Sum of the digits
- 2 + 0 + 0 + 0 + 1 = 3
- Rounded to the nearest 10
- 20,000
- Rounded to the nearest 100
- 20,000
- Rounded to the nearest 1000
- 20,000
- Number before
- 20,000
- Number after
- 20,002
- In binary
100111000100001
Quick check
What number comes just after 20,001?
Show the answer
20,002
Is 20,001 even or odd?
Show the answer
Odd
What is 20,001 + 10?
Show the answer
20,011
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 20,001 in words?
20,001 is written "twenty thousand one".
Is 20,001 a prime number?
No. 20,001 is a composite number, because it has more than two factors.
What are the factors of 20,001?
The factors of 20,001 are 1, 3, 59, 113, 177, 339, 6,667 and 20,001.