18123633788 has 96 divisors (see below), whose sum is σ = 35948570112. Its totient is φ = 7937740800.

The previous prime is 18123633779. The next prime is 18123633793. The reversal of 18123633788 is 88733632181.

It is a happy number.

It is a super-2 number, since 2×18123633788² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27418178 + ... + 27418838.

It is an arithmetic number, because the mean of its divisors is an integer number (374464272).

Almost surely, 2^18123633788 is an apocalyptic number.

It is an amenable number.

18123633788 is a deficient number, since it is larger than the sum of its proper divisors (17824936324).

18123633788 is a wasteful number, since it uses less digits than its factorization.

18123633788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015 (or 1013 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 50.

The spelling of 18123633788 in words is "eighteen billion, one hundred twenty-three million, six hundred thirty-three thousand, seven hundred eighty-eight".