The Number
20809
Twenty Thousand Eight Hundred and Nine
In Base 21 Unovigesimal Is
253j21
The numbers with a 21 subscript use Base 21 Unovigesimal notation.
For more familiar numbers: See Twenty Thousand Eight Hundred and Nine 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.
2.0809e4
Reciprocal
A number multiplied with its reciprocal is one.
0.000975c74h6g538b21
The reciprocal of 20809 in Base 21 Unovigesimal.
Palindrome?
A numerical palindrome has the same value when all of its digits are reversed.
The number 253j21 is not a palindrome.
A Prime Number
A prime number is a positive integer that is divisible only by itself and one.
Twenty thousand eight hundred and nine is the 2344th prime number. See primes in Base 21 Unovigesimal
Not A Composite
Composites have more than just these two factors.
Twenty Thousand Eight Hundred and Nine is not a composite number because it has exactly two factors: One and Twenty Thousand Eight Hundred and Nine
Prime Factors
The number twenty thousand eight hundred and nine has the following 1 prime factor:
Prime Factorization
The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities
253j211
= 253j21
Base Conversions
The number twenty thousand eight hundred and nine in 35 different bases