21083016579756 has 96 divisors (see below), whose sum is σ = 54712074267648. Its totient is φ = 6284803430400.

The previous prime is 21083016579749. The next prime is 21083016579769. The reversal of 21083016579756 is 65797561038012.

It is a self number, because there is not a number n which added to its sum of digits gives 21083016579756.

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 31 ways as a sum of consecutive naturals, for example, 14170305 + ... + 15587288.

It is an arithmetic number, because the mean of its divisors is an integer number (569917440288).

Almost surely, 2^{21083016579756} is an apocalyptic number.

It is an amenable number.

21083016579756 is an abundant number, since it is smaller than the sum of its proper divisors (33629057687892).

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

21083016579756 is a wasteful number, since it uses less digits than its factorization.

21083016579756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29757791 (or 29757789 counting only the distinct ones).

The product of its (nonzero) digits is 19051200, while the sum is 60.

The spelling of 21083016579756 in words is "twenty-one trillion, eighty-three billion, sixteen million, five hundred seventy-nine thousand, seven hundred fifty-six".