18975165 has 16 divisors (see below), whose sum is σ = 33120576. Its totient is φ = 9200000.

The previous prime is 18975163. The next prime is 18975199. The reversal of 18975165 is 56157981.

It is not a de Polignac number, because 18975165 - 2¹ = 18975163 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18975163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57336 + ... + 57665.

It is an arithmetic number, because the mean of its divisors is an integer number (2070036).

Almost surely, 2^18975165 is an apocalyptic number.

18975165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18975165 is a deficient number, since it is larger than the sum of its proper divisors (14145411).

18975165 is a wasteful number, since it uses less digits than its factorization.

18975165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115020.

The product of its digits is 75600, while the sum is 42.

The square root of 18975165 is about 4356.0492421459. The cubic root of 18975165 is about 266.7238514515.

The spelling of 18975165 in words is "eighteen million, nine hundred seventy-five thousand, one hundred sixty-five".