18110438836 has 24 divisors (see below), whose sum is σ = 36226443456. Its totient is φ = 7760424000.

The previous prime is 18110438807. The next prime is 18110438873. The reversal of 18110438836 is 63883401181.

It is a junction number, because it is equal to n+sod(n) for n = 18110438792 and 18110438801.

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, 149835 + ... + 242221.

It is an arithmetic number, because the mean of its divisors is an integer number (1509435144).

Almost surely, 2^18110438836 is an apocalyptic number.

It is an amenable number.

18110438836 is an abundant number, since it is smaller than the sum of its proper divisors (18116004620).

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

18110438836 is a wasteful number, since it uses less digits than its factorization.

18110438836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99399 (or 99397 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The spelling of 18110438836 in words is "eighteen billion, one hundred ten million, four hundred thirty-eight thousand, eight hundred thirty-six".