The Number
21390
Twenty-One Thousand Three Hundred and Ninety
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.
2.1390e4
Reciprocal
A number multiplied with its reciprocal is one.
0.00004675081813931744
The reciprocal of 21390.
Palindrome?
A numerical palindrome has the same value when all of its digits are reversed.
The number 21390 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 three hundred and ninety is a composite number with 32 total factors (including 1 and itself). See primes in Base 10 Decimal
A Composite
Composites have more than just these two factors.
Twenty-one thousand three hundred and ninety is a composite number with 32 total factors (including 1 and itself).
Prime Factors
The number twenty-one thousand three hundred and ninety has the following 5 prime factors:
Prime Factorization
The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities
21
·
31
·
51
·
231
·
311
= 21390
Base Conversions
The number twenty-one thousand three hundred and ninety in 35 different bases