The Number
20991
Twenty Thousand Nine Hundred and Ninety-One
In Base 13 Tridecimal Is
972913
The numbers with a 13 subscript use Base 13 Tridecimal notation.
For more familiar numbers: See Twenty Thousand Nine Hundred and Ninety-One in Base 10 Decimal
Nearby Numbers
Positive, nonzero integers within three units
Scientific Notation
Scientific notation expresses a quantity as the product of its significand with 10 raised to an integer exponent.
2.0991e4
Reciprocal
A number multiplied with its reciprocal is one.
0.000148c3c896b33c513
The reciprocal of 20991 in Base 13 Tridecimal.
Palindrome?
A numerical palindrome has the same value when all of its digits are reversed.
The number 972913 is not a palindrome.
Not A Prime Number
A prime number is a positive integer that is divisible only by itself and one.
Twenty thousand nine hundred and ninety-one is a composite number with 4 total factors (including 1 and itself). See primes in Base 13 Tridecimal
A Composite
Composites have more than just these two factors.
Twenty thousand nine hundred and ninety-one is a composite number with 4 total factors (including 1 and itself).
Prime Factors
The number twenty thousand nine hundred and ninety-one has the following 2 prime factors:
Prime Factorization
The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities
3131
·
3253131
= 972913
Base Conversions
The number twenty thousand nine hundred and ninety-one in 35 different bases