13 in words
British English
thirteen
Thirteen, not thirtheen. The teen numbers from thirteen to nineteen are one word.
Quick reference
- In figures
- 13
- British English
- thirteen
- American English
- The same (why they differ)
- Ordinal
- thirteenth (13th)
- Roman numeral
- XIII
- Place value
- 1 in the tens column; 3 in the ones column
- Expanded form
- 10 + 3
- Standard form
- 1.3 × 10¹
- Even or odd
- Odd
- Prime factors
- None but itself and one: it is prime
Convert any other number, up to thirty-six digits.