18933103794472 has 32 divisors (see below), whose sum is σ = 40573770203520. Its totient is φ = 8113620640320.

The previous prime is 18933103794377. The next prime is 18933103794511. The reversal of 18933103794472 is 27449730133981.

It is a self number, because there is not a number n which added to its sum of digits gives 18933103794472.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10996779 + ... + 12601402.

It is an arithmetic number, because the mean of its divisors is an integer number (1267930318860).

Almost surely, 2^{18933103794472} is an apocalyptic number.

It is an amenable number.

18933103794472 is an abundant number, since it is smaller than the sum of its proper divisors (21640666409048).

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

18933103794472 is a wasteful number, since it uses less digits than its factorization.

18933103794472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23612521 (or 23612517 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 61.

The spelling of 18933103794472 in words is "eighteen trillion, nine hundred thirty-three billion, one hundred three million, seven hundred ninety-four thousand, four hundred seventy-two".