The Number
81021
Eighty-One Thousand and Twenty-One
In Base 18 Octodecimal Is
dg1318
The numbers with a 18 subscript use Base 18 Octodecimal notation.
For more familiar numbers: See Eighty-One Thousand and Twenty-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.
8.1021e4
Reciprocal
A number multiplied with its reciprocal is one.
0.000155e5b72f835a518
The reciprocal of 81021 in Base 18 Octodecimal.
Palindrome?
A numerical palindrome has the same value when all of its digits are reversed.
The number dg1318 is not a palindrome.
Not A Prime Number
A prime number is a positive integer that is divisible only by itself and one.
Eighty-one thousand and twenty-one is a composite number with 8 total factors (including 1 and itself). See primes in Base 18 Octodecimal
A Composite
Composites have more than just these two factors.
Eighty-one thousand and twenty-one is a composite number with 8 total factors (including 1 and itself).
Prime Factors
The number eighty-one thousand and twenty-one 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
3181
·
65181
·
d5181
= dg1318
Base Conversions
The number eighty-one thousand and twenty-one in 35 different bases