18368672 has 24 divisors (see below), whose sum is σ = 41330016. Its totient is φ = 7872192.

The previous prime is 18368671. The next prime is 18368677. The reversal of 18368672 is 27686381.

It is a happy number.

It is a super-2 number, since 2×18368672² = 674816222087168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18368671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40778 + ... + 41225.

It is an arithmetic number, because the mean of its divisors is an integer number (1722084).

Almost surely, 2^18368672 is an apocalyptic number.

It is an amenable number.

18368672 is an abundant number, since it is smaller than the sum of its proper divisors (22961344).

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

18368672 is an equidigital number, since it uses as much as digits as its factorization.

18368672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82020 (or 82012 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 18368672 is about 4285.8688734025. The cubic root of 18368672 is about 263.8513089845.

The spelling of 18368672 in words is "eighteen million, three hundred sixty-eight thousand, six hundred seventy-two".