18855301172180 has 48 divisors (see below), whose sum is σ = 45469243028160. Its totient is φ = 6495606144000.

The previous prime is 18855301172159. The next prime is 18855301172249. The reversal of 18855301172180 is 8127110355881.

It is a super-2 number, since 2×18855301172180² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2255414621 + ... + 2255422980.

It is an arithmetic number, because the mean of its divisors is an integer number (947275896420).

Almost surely, 2^{18855301172180} is an apocalyptic number.

18855301172180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18855301172180 is an abundant number, since it is smaller than the sum of its proper divisors (26613941855980).

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

18855301172180 is a wasteful number, since it uses less digits than its factorization.

18855301172180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4510837640 (or 4510837638 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 50.

The spelling of 18855301172180 in words is "eighteen trillion, eight hundred fifty-five billion, three hundred one million, one hundred seventy-two thousand, one hundred eighty".