18,221 in words
18,221
eighteen thousand two hundred twenty-one
18,221 is written eighteen thousand two hundred twenty-one.
Ways to write it
- As an ordinal
- eighteen thousand two hundred twenty-first
- Expanded form
- 10,000 + 8,000 + 200 + 20 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 1 | 10,000 |
| thousands | 8 | 8,000 |
| hundreds | 2 | 200 |
| tens | 2 | 20 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 7, 19, 133, 137, 959, 2,603 and 18,221 (8 factors)
- First 10 multiples
- 18,221, 36,442, 54,663, 72,884, 91,105, 109,326, 127,547, 145,768, 163,989, 182,210
- Square
- 18,221 × 18,221 = 332,004,841
- Square root
- ≈ 134.99
- Sum of the digits
- 1 + 8 + 2 + 2 + 1 = 14
- Rounded to the nearest 10
- 18,220
- Rounded to the nearest 100
- 18,200
- Rounded to the nearest 1000
- 18,000
- Number before
- 18,220
- Number after
- 18,222
- In binary
100011100101101
Quick check
What number comes just after 18,221?
Show the answer
18,222
Is 18,221 even or odd?
Show the answer
Odd
What is 18,221 + 10?
Show the answer
18,231
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 18,221 in words?
18,221 is written "eighteen thousand two hundred twenty-one".
Is 18,221 a prime number?
No. 18,221 is a composite number, because it has more than two factors.
What are the factors of 18,221?
The factors of 18,221 are 1, 7, 19, 133, 137, 959, 2,603 and 18,221.