1811

The numbers with a 11 subscript use Base 11 Undecimal notation.

For more familiar numbers: See Nineteen in Base 10 Decimal

Nearby Numbers

Positive, nonzero integers within three units

16
1511
Sixteen in Base 11 Undecimal
17
1611
Seventeen in Base 11 Undecimal
18
1711
Eightteen in Base 11 Undecimal
20
1911
Twenty in Base 11 Undecimal
21
1a11
Twenty-One in Base 11 Undecimal
22
2011
Twenty-Two in Base 11 Undecimal

Scientific Notation

Scientific notation expresses a quantity as the product of its significand with 10 raised to an integer exponent.

Reciprocal

A number multiplied with its reciprocal is one.

0.0640640640640640611

The reciprocal of 19 in Base 11 Undecimal.

Palindrome?

A numerical palindrome has the same value when all of its digits are reversed.

The number 1811 is not a palindrome.

A Prime Number

A prime number is a positive integer that is divisible only by itself and one.

Nineteen is the 8th prime number.   See primes in Base 11 Undecimal

Not A Composite

Composites have more than just these two factors.

Nineteen is not a composite number because it has exactly two factors: One and Nineteen

Prime Factors

The prime factors of a positive integer are the integers that divide it exactly and are also prime.

The number nineteen has the following 1 prime factor:

19
1811
Nineteen in Base 11 Undecimal

Prime Factorization

The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities

Base Conversions

The number nineteen in 35 different bases