18385033900 has 36 divisors (see below), whose sum is σ = 41630116752. Its totient is φ = 7034272960.

The previous prime is 18385033889. The next prime is 18385033903. The reversal of 18385033900 is 933058381.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18385033903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3994447 + ... + 3999046.

It is an arithmetic number, because the mean of its divisors is an integer number (1156392132).

Almost surely, 2^18385033900 is an apocalyptic number.

18385033900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18385033900 is an abundant number, since it is smaller than the sum of its proper divisors (23245082852).

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

18385033900 is a wasteful number, since it uses less digits than its factorization.

18385033900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7993530 (or 7993523 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 18385033900 in words is "eighteen billion, three hundred eighty-five million, thirty-three thousand, nine hundred".