18163194 has 16 divisors (see below), whose sum is σ = 41515968. Its totient is φ = 5189472.

The previous prime is 18163163. The next prime is 18163199. The reversal of 18163194 is 49136181.

It is not an unprimeable number, because it can be changed into a prime (18163199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216187 + ... + 216270.

It is an arithmetic number, because the mean of its divisors is an integer number (2594748).

Almost surely, 2^18163194 is an apocalyptic number.

18163194 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18163194 is an abundant number, since it is smaller than the sum of its proper divisors (23352774).

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

18163194 is a wasteful number, since it uses less digits than its factorization.

18163194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432469.

The product of its digits is 5184, while the sum is 33.

The square root of 18163194 is about 4261.8298886746. The cubic root of 18163194 is about 262.8637750093.

The spelling of 18163194 in words is "eighteen million, one hundred sixty-three thousand, one hundred ninety-four".