18168975 has 48 divisors (see below), whose sum is σ = 36426240. Its totient is φ = 8805600.

The previous prime is 18168967. The next prime is 18168977. The reversal of 18168975 is 57986181.

It is not a de Polignac number, because 18168975 - 2³ = 18168967 is a prime.

It is a super-2 number, since 2×18168975² = 660223305101250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 18168975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18168977) 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 47 ways as a sum of consecutive naturals, for example, 6202 + ... + 8648.

It is an arithmetic number, because the mean of its divisors is an integer number (758880).

Almost surely, 2^18168975 is an apocalyptic number.

18168975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18168975 is an abundant number, since it is smaller than the sum of its proper divisors (18257265).

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

18168975 is a wasteful number, since it uses less digits than its factorization.

18168975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2477 (or 2466 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 18168975 is about 4262.5080645085. The cubic root of 18168975 is about 262.8916602350.

The spelling of 18168975 in words is "eighteen million, one hundred sixty-eight thousand, nine hundred seventy-five".