18940667778696 has 16 divisors (see below), whose sum is σ = 47351669446800. Its totient is φ = 6313555926224.

The previous prime is 18940667778679. The next prime is 18940667778733. The reversal of 18940667778696 is 69687776604981.

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 3 ways as a sum of consecutive naturals, for example, 394597245366 + ... + 394597245413.

It is an arithmetic number, because the mean of its divisors is an integer number (2959479340425).

Almost surely, 2^{18940667778696} is an apocalyptic number.

It is an amenable number.

18940667778696 is an abundant number, since it is smaller than the sum of its proper divisors (28411001668104).

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

18940667778696 is a wasteful number, since it uses less digits than its factorization.

18940667778696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789194490788 (or 789194490784 counting only the distinct ones).

The product of its (nonzero) digits is 9217732608, while the sum is 84.

The spelling of 18940667778696 in words is "eighteen trillion, nine hundred forty billion, six hundred sixty-seven million, seven hundred seventy-eight thousand, six hundred ninety-six".