21320882 has 8 divisors (see below), whose sum is σ = 34888752. Its totient is φ = 9691300.

The previous prime is 21320881. The next prime is 21320911. The reversal of 21320882 is 28802312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21320881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 484544 + ... + 484587.

It is an arithmetic number, because the mean of its divisors is an integer number (4361094).

Almost surely, 2^21320882 is an apocalyptic number.

21320882 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21320882 is a deficient number, since it is larger than the sum of its proper divisors (13567870).

21320882 is a wasteful number, since it uses less digits than its factorization.

21320882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969144.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 21320882 is about 4617.4540604103. The cubic root of 21320882 is about 277.2905412870.

The spelling of 21320882 in words is "twenty-one million, three hundred twenty thousand, eight hundred eighty-two".