21376765407336 has 64 divisors (see below), whose sum is σ = 55517221332480. Its totient is φ = 6851808887040.

The previous prime is 21376765407331. The next prime is 21376765407337. The reversal of 21376765407336 is 63370456767312.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 21376765407336.

It is not an unprimeable number, because it can be changed into a prime (21376765407331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91387051 + ... + 91620666.

It is an arithmetic number, because the mean of its divisors is an integer number (867456583320).

Almost surely, 2^{21376765407336} is an apocalyptic number.

It is an amenable number.

21376765407336 is an abundant number, since it is smaller than the sum of its proper divisors (34140455925144).

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

21376765407336 is a wasteful number, since it uses less digits than its factorization.

21376765407336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183007914 (or 183007910 counting only the distinct ones).

The product of its (nonzero) digits is 80015040, while the sum is 60.

The spelling of 21376765407336 in words is "twenty-one trillion, three hundred seventy-six billion, seven hundred sixty-five million, four hundred seven thousand, three hundred thirty-six".