21312502104 has 64 divisors (see below), whose sum is σ = 53478828000. Its totient is φ = 7077878784.

The previous prime is 21312502087. The next prime is 21312502147. The reversal of 21312502104 is 40120521312.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 10934122 + ... + 10936070.

Almost surely, 2^21312502104 is an apocalyptic number.

21312502104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21312502104 is an abundant number, since it is smaller than the sum of its proper divisors (32166325896).

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

21312502104 is a wasteful number, since it uses less digits than its factorization.

21312502104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3412 (or 3408 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The spelling of 21312502104 in words is "twenty-one billion, three hundred twelve million, five hundred two thousand, one hundred four".