The Number
21890
Twenty-One Thousand Eight 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.
2.1890e4
Reciprocal
A number multiplied with its reciprocal is one.
0.00004568296025582458
The reciprocal of 21890.
Palindrome?
A numerical palindrome has the same value when all of its digits are reversed.
The number 21890 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 eight hundred and ninety is a composite number with 16 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 eight hundred and ninety is a composite number with 16 total factors (including 1 and itself).
Prime Factors
The number twenty-one thousand eight hundred and ninety 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
21
·
51
·
111
·
1991
= 21890
Base Conversions
The number twenty-one thousand eight hundred and ninety in 35 different bases