18004672 has 28 divisors (see below), whose sum is σ = 40833040. Its totient is φ = 7716096.

The previous prime is 18004661. The next prime is 18004673. The reversal of 18004672 is 27640081.

It is a tau number, because it is divible by the number of its divisors (28).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 18004672.

It is not an unprimeable number, because it can be changed into a prime (18004673) 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, 19647 + ... + 20542.

Almost surely, 2^18004672 is an apocalyptic number.

It is an amenable number.

18004672 is an abundant number, since it is smaller than the sum of its proper divisors (22828368).

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

18004672 is an equidigital number, since it uses as much as digits as its factorization.

18004672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40208 (or 40198 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 18004672 is about 4243.1912518764. The cubic root of 18004672 is about 262.0968117257.

The spelling of 18004672 in words is "eighteen million, four thousand, six hundred seventy-two".