18868185560 has 32 divisors (see below), whose sum is σ = 48518192160. Its totient is φ = 6469092096.

The previous prime is 18868185541. The next prime is 18868185587. The reversal of 18868185560 is 6558186881.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a junction number, because it is equal to n+sod(n) for n = 18868185496 and 18868185505.

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, 33692909 + ... + 33693468.

It is an arithmetic number, because the mean of its divisors is an integer number (1516193505).

Almost surely, 2^18868185560 is an apocalyptic number.

18868185560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18868185560 is an abundant number, since it is smaller than the sum of its proper divisors (29650006600).

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

18868185560 is a wasteful number, since it uses less digits than its factorization.

18868185560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67386395 (or 67386391 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 56.

The spelling of 18868185560 in words is "eighteen billion, eight hundred sixty-eight million, one hundred eighty-five thousand, five hundred sixty".