18355518353800 has 96 divisors (see below), whose sum is σ = 42762855267720. Its totient is φ = 7327379404800.

The previous prime is 18355518353771. The next prime is 18355518353827. The reversal of 18355518353800 is 835381555381.

It can be written as a sum of positive squares in 12 ways, for example, as 1292191468516 + 17063326885284 = 1136746^2 + 4130778^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 198785242 + ... + 198877558.

Almost surely, 2^{18355518353800} is an apocalyptic number.

18355518353800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18355518353800 is an abundant number, since it is smaller than the sum of its proper divisors (24407336913920).

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

18355518353800 is a wasteful number, since it uses less digits than its factorization.

18355518353800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94331 (or 94322 counting only the distinct ones).

The product of its (nonzero) digits is 8640000, while the sum is 55.

The spelling of 18355518353800 in words is "eighteen trillion, three hundred fifty-five billion, five hundred eighteen million, three hundred fifty-three thousand, eight hundred".