21487072688876 has 24 divisors (see below), whose sum is σ = 37757330311680. Its totient is φ = 10699343730000.

The previous prime is 21487072688867. The next prime is 21487072688881. The reversal of 21487072688876 is 67888627078412.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8883710 + ... + 11040581.

It is an arithmetic number, because the mean of its divisors is an integer number (1573222096320).

Almost surely, 2^{21487072688876} is an apocalyptic number.

It is an amenable number.

21487072688876 is a deficient number, since it is larger than the sum of its proper divisors (16270257622804).

21487072688876 is a wasteful number, since it uses less digits than its factorization.

21487072688876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19925405 (or 19925403 counting only the distinct ones).

The product of its (nonzero) digits is 809238528, while the sum is 74.

The spelling of 21487072688876 in words is "twenty-one trillion, four hundred eighty-seven billion, seventy-two million, six hundred eighty-eight thousand, eight hundred seventy-six".