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19 in words

19

nineteen

19 is written nineteen.

Ways to write it

As an ordinal: nineteenth
Roman numeral: XIX
Expanded form: 10 + 9

Place value

Place	Digit	Value
tens	1	10
ones	9	9

Number facts

Even or odd: Odd
Prime or composite: Prime
Factors: 1 and 19 (2 factors)
First 10 multiples: 19, 38, 57, 76, 95, 114, 133, 152, 171, 190
Square: 19 × 19 = 361
Square root: ≈ 4.36
Sum of the digits: 1 + 9 = 10
Rounded to the nearest 10: 20
Number before: 18
Number after: 20
In binary: 10011

Quick check

What number comes just after 19?
Show the answer
20
Is 19 even or odd?
Show the answer
Odd
What is 19 + 10?
Show the answer
29

Practice with a game

Count with Me

Count pictures up to 5, 10 or 20 and compare groups.

Place Value Quest

Ones, tens, hundreds and thousands.

Times Tables Challenge

Practice any times table from 2× to 12×.

Frequently asked questions

How do you write 19 in words?

19 is written "nineteen".

Is 19 a prime number?

Yes. 19 is a prime number: its only factors are 1 and 19.

What are the factors of 19?

The factors of 19 are 1 and 19.

How do you write 19 in Roman numerals?

19 in Roman numerals is XIX.