The Number
20405
Twenty Thousand Four Hundred and Five
In Base 21 Unovigesimal Is
245e21
The numbers with a 21 subscript use Base 21 Unovigesimal notation.
For more familiar numbers: See Twenty Thousand Four Hundred and Five 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.
2.0405e4
Reciprocal
A number multiplied with its reciprocal is one.
0.0009b3408g5cef1g21
The reciprocal of 20405 in Base 21 Unovigesimal.
Palindrome?
A numerical palindrome has the same value when all of its digits are reversed.
The number 245e21 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 four hundred and five is a composite number with 16 total factors (including 1 and itself). See primes in Base 21 Unovigesimal
A Composite
Composites have more than just these two factors.
Twenty thousand four hundred and five is a composite number with 16 total factors (including 1 and itself).
Prime Factors
The number twenty thousand four hundred and five has the following 4 prime factors:
Prime Factorization
The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities
5211
·
7211
·
b211
·
2b211
= 245e21
Base Conversions
The number twenty thousand four hundred and five in 35 different bases