18109168 has 40 divisors (see below), whose sum is σ = 43747200. Its totient is φ = 7055040.

The previous prime is 18109163. The next prime is 18109171. The reversal of 18109168 is 86190181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18109163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6118 + ... + 8581.

It is an arithmetic number, because the mean of its divisors is an integer number (1093680).

Almost surely, 2^18109168 is an apocalyptic number.

It is an amenable number.

18109168 is an abundant number, since it is smaller than the sum of its proper divisors (25638032).

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

18109168 is a wasteful number, since it uses less digits than its factorization.

18109168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14725 (or 14719 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 34.

The square root of 18109168 is about 4255.4868111651. The cubic root of 18109168 is about 262.6028887673.

The spelling of 18109168 in words is "eighteen million, one hundred nine thousand, one hundred sixty-eight".