18500020033338 has 24 divisors (see below), whose sum is σ = 40762756008000. Its totient is φ = 6062153456904.

The previous prime is 18500020033301. The next prime is 18500020033361. The reversal of 18500020033338 is 83333002000581.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8709989538 + ... + 8709991661.

It is an arithmetic number, because the mean of its divisors is an integer number (1698448167000).

Almost surely, 2^{18500020033338} is an apocalyptic number.

18500020033338 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18500020033338 is an abundant number, since it is smaller than the sum of its proper divisors (22262735974662).

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

18500020033338 is a wasteful number, since it uses less digits than its factorization.

18500020033338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17419981266 (or 17419981263 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 18500020033338 in words is "eighteen trillion, five hundred billion, twenty million, thirty-three thousand, three hundred thirty-eight".