19

19 is a prime number. Like all primes greater than two, it is odd and has no factors apart from itself and one.

What does the number 19 look like?

As a prime, it is not composed of any other numbers and has no internal structure.

19 is a prime number. Like all primes (except two), it is an odd number.

Prime factorization of 19:

19

See below for interesting mathematical facts about the number 19 from the Numbermatics database.

Names of 19

Cardinal: 19 can be written as Nineteen.

Scientific notation

Scientific notation: 1.9 × 10¹

Factors of 19

Number of distinct prime factors ω(n): 1
Total number of prime factors Ω(n): 1
Sum of prime factors: 19

Divisors of 19

Number of divisors d(n): 2
Complete list of divisors:
1 19
Sum of all divisors σ(n): 20
Sum of proper divisors (its aliquot sum) s(n): 1
19 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 18

Bases of 19

Binary: 10011₂
Hexadecimal: 0x13
Base-36: J

Squares and roots of 19

19 squared (19²) is 361
19 cubed (19³) is 6859
The square root of 19 is 4.3588989437
The cube root of 19 is 2.6684016487

Scales and comparisons

How big is 19?

A cube with a volume of 19 cubic inches would be around 0.2 feet tall.

Recreational maths with 19

19 backwards is 91
The number of decimal digits it has is: 2
The sum of 19's digits is 10
More coming soon!

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The information we have on file for 19 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

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