18868375772 has 18 divisors (see below), whose sum is σ = 34457700984. Its totient is φ = 9023375680.

The previous prime is 18868375753. The next prime is 18868375777. The reversal of 18868375772 is 27757386881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18868375777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1310372 + ... + 1324692.

Almost surely, 2^18868375772 is an apocalyptic number.

It is an amenable number.

18868375772 is a deficient number, since it is larger than the sum of its proper divisors (15589325212).

18868375772 is an frugal number, since it uses more digits than its factorization.

18868375772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28669 (or 14346 counting only the distinct ones).

The product of its digits is 31610880, while the sum is 62.

The spelling of 18868375772 in words is "eighteen billion, eight hundred sixty-eight million, three hundred seventy-five thousand, seven hundred seventy-two".