21007716725512 has 32 divisors (see below), whose sum is σ = 42976358488800. Its totient is φ = 9547622409600.

The previous prime is 21007716725507. The next prime is 21007716725531. The reversal of 21007716725512 is 21552761770012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16115814 + ... + 17370517.

It is an arithmetic number, because the mean of its divisors is an integer number (1343011202775).

Almost surely, 2^{21007716725512} is an apocalyptic number.

21007716725512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21007716725512 is an abundant number, since it is smaller than the sum of its proper divisors (21968641763288).

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

21007716725512 is a wasteful number, since it uses less digits than its factorization.

21007716725512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33493477 (or 33493473 counting only the distinct ones).

The product of its (nonzero) digits is 411600, while the sum is 46.

The spelling of 21007716725512 in words is "twenty-one trillion, seven billion, seven hundred sixteen million, seven hundred twenty-five thousand, five hundred twelve".