The Number
21009
Twenty-One Thousand and Nine
In Base 25 Pentavigesimal Is
18f925
The numbers with a 25 subscript use Base 25 Pentavigesimal notation.
For more familiar numbers: See Twenty-One Thousand 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.
2.1009e4
Reciprocal
A number multiplied with its reciprocal is one.
0.000iekj28363m7a25
The reciprocal of 21009 in Base 25 Pentavigesimal.
Palindrome?
A numerical palindrome has the same value when all of its digits are reversed.
The number 18f925 is not a palindrome.
Not A Prime Number
A prime number is a positive integer that is divisible only by itself and one.
Twenty-one thousand and nine is a composite number with 8 total factors (including 1 and itself). See primes in Base 25 Pentavigesimal
A Composite
Composites have more than just these two factors.
Twenty-one thousand and nine is a composite number with 8 total factors (including 1 and itself).
Prime Factors
The number twenty-one thousand and nine has the following 3 prime factors:
Prime Factorization
The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities
3251
·
1m251
·
5o251
= 18f925
Base Conversions
The number twenty-one thousand and nine in 35 different bases