18383955478928 has 40 divisors (see below), whose sum is σ = 38400570331200. Its totient is φ = 8475669684864.

The previous prime is 18383955478913. The next prime is 18383955479027. The reversal of 18383955478928 is 82987455938381.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 47896118 + ... + 48278421.

It is an arithmetic number, because the mean of its divisors is an integer number (960014258280).

Almost surely, 2^{18383955478928} is an apocalyptic number.

It is an amenable number.

18383955478928 is an abundant number, since it is smaller than the sum of its proper divisors (20016614852272).

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

18383955478928 is a wasteful number, since it uses less digits than its factorization.

18383955478928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96175479 (or 96175473 counting only the distinct ones).

The product of its digits is 4180377600, while the sum is 80.

The spelling of 18383955478928 in words is "eighteen trillion, three hundred eighty-three billion, nine hundred fifty-five million, four hundred seventy-eight thousand, nine hundred twenty-eight".