18768989364 has 24 divisors (see below), whose sum is σ = 44047459680. Its totient is φ = 6220165344.

The previous prime is 18768989357. The next prime is 18768989381. The reversal of 18768989364 is 46398986781.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4518394 + ... + 4522545.

It is an arithmetic number, because the mean of its divisors is an integer number (1835310820).

Almost surely, 2^18768989364 is an apocalyptic number.

It is an amenable number.

18768989364 is an abundant number, since it is smaller than the sum of its proper divisors (25278470316).

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

18768989364 is a wasteful number, since it uses less digits than its factorization.

18768989364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9041119 (or 9041117 counting only the distinct ones).

The product of its digits is 125411328, while the sum is 69.

The spelling of 18768989364 in words is "eighteen billion, seven hundred sixty-eight million, nine hundred eighty-nine thousand, three hundred sixty-four".