18164472 has 16 divisors (see below), whose sum is σ = 45411240. Its totient is φ = 6054816.

The previous prime is 18164459. The next prime is 18164479. The reversal of 18164472 is 27446181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18164479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378403 + ... + 378450.

Almost surely, 2^18164472 is an apocalyptic number.

18164472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18164472 is an abundant number, since it is smaller than the sum of its proper divisors (27246768).

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

18164472 is a wasteful number, since it uses less digits than its factorization.

18164472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756862 (or 756858 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 18164472 is about 4261.9798216322. The cubic root of 18164472 is about 262.8699400782.

The spelling of 18164472 in words is "eighteen million, one hundred sixty-four thousand, four hundred seventy-two".