18988767933912 has 80 divisors (see below), whose sum is σ = 60784151337360. Its totient is φ = 5425362265536.

The previous prime is 18988767933871. The next prime is 18988767933923. The reversal of 18988767933912 is 21933976788981.

18988767933912 is a `hidden beast` number, since 1 + 8 + 9 + 8 + 87 + 67 + 93 + 391 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2093113623 + ... + 2093122694.

It is an arithmetic number, because the mean of its divisors is an integer number (759801891717).

Almost surely, 2^{18988767933912} is an apocalyptic number.

18988767933912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18988767933912 is an abundant number, since it is smaller than the sum of its proper divisors (41795383403448).

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

18988767933912 is a wasteful number, since it uses less digits than its factorization.

18988767933912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4186236342 (or 4186236329 counting only the distinct ones).

The product of its digits is 1975228416, while the sum is 81.

The spelling of 18988767933912 in words is "eighteen trillion, nine hundred eighty-eight billion, seven hundred sixty-seven million, nine hundred thirty-three thousand, nine hundred twelve".