18168472 has 16 divisors (see below), whose sum is σ = 38932560. Its totient is φ = 7786464.

The previous prime is 18168467. The next prime is 18168481. The reversal of 18168472 is 27486181.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162163 + ... + 162274.

It is an arithmetic number, because the mean of its divisors is an integer number (2433285).

Almost surely, 2^18168472 is an apocalyptic number.

It is an amenable number.

18168472 is an abundant number, since it is smaller than the sum of its proper divisors (20764088).

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

18168472 is a wasteful number, since it uses less digits than its factorization.

18168472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324450 (or 324446 counting only the distinct ones).

The product of its digits is 21504, while the sum is 37.

The square root of 18168472 is about 4262.4490612792. The cubic root of 18168472 is about 262.8892341997.

It can be divided in two parts, 18 and 168472, that added together give a triangular number (168490 = T₅₈₀).

The spelling of 18168472 in words is "eighteen million, one hundred sixty-eight thousand, four hundred seventy-two".