18955374165 has 256 divisors, whose sum is σ = 43060469760. Its totient is φ = 7795097856.

The previous prime is 18955374127. The next prime is 18955374199. The reversal of 18955374165 is 56147355981.

18955374165 is a `hidden beast` number, since 1 + 8 + 9 + 5 + 537 + 41 + 65 = 666.

It is not a de Polignac number, because 18955374165 - 2⁷ = 18955374037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 42788434 + ... + 42788876.

It is an arithmetic number, because the mean of its divisors is an integer number (168204960).

Almost surely, 2^18955374165 is an apocalyptic number.

18955374165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18955374165 is an abundant number, since it is smaller than the sum of its proper divisors (24105095595).

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

18955374165 is an equidigital number, since it uses as much as digits as its factorization.

18955374165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532 (or 514 counting only the distinct ones).

The product of its digits is 4536000, while the sum is 54.

The spelling of 18955374165 in words is "eighteen billion, nine hundred fifty-five million, three hundred seventy-four thousand, one hundred sixty-five".