21311586088 has 32 divisors (see below), whose sum is σ = 43041196800. Its totient is φ = 9834245568.

The previous prime is 21311586073. The next prime is 21311586097. The reversal of 21311586088 is 88068511312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 634993 + ... + 667711.

It is an arithmetic number, because the mean of its divisors is an integer number (1345037400).

Almost surely, 2^21311586088 is an apocalyptic number.

It is an amenable number.

21311586088 is an abundant number, since it is smaller than the sum of its proper divisors (21729610712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21311586088 is a wasteful number, since it uses less digits than its factorization.

21311586088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39001 (or 38997 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 43.

The spelling of 21311586088 in words is "twenty-one billion, three hundred eleven million, five hundred eighty-six thousand, eighty-eight".