18055535900 has 36 divisors (see below), whose sum is σ = 40884018672. Its totient is φ = 6908204160.

The previous prime is 18055535893. The next prime is 18055535903. The reversal of 18055535900 is 953555081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18055535903) 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, 3922817 + ... + 3927416.

Almost surely, 2^18055535900 is an apocalyptic number.

18055535900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18055535900 is an abundant number, since it is smaller than the sum of its proper divisors (22828482772).

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

18055535900 is a wasteful number, since it uses less digits than its factorization.

18055535900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7850270 (or 7850263 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 18055535900 in words is "eighteen billion, fifty-five million, five hundred thirty-five thousand, nine hundred".