18013672 has 32 divisors (see below), whose sum is σ = 36525600. Its totient is φ = 8299584.

The previous prime is 18013657. The next prime is 18013673. The reversal of 18013672 is 27631081.

It is a self number, because there is not a number n which added to its sum of digits gives 18013672.

It is not an unprimeable number, because it can be changed into a prime (18013673) 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 7 ways as a sum of consecutive naturals, for example, 4023 + ... + 7225.

It is an arithmetic number, because the mean of its divisors is an integer number (1141425).

Almost surely, 2^18013672 is an apocalyptic number.

It is an amenable number.

18013672 is an abundant number, since it is smaller than the sum of its proper divisors (18511928).

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

18013672 is a wasteful number, since it uses less digits than its factorization.

18013672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3265 (or 3261 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 18013672 is about 4244.2516419270. The cubic root of 18013672 is about 262.1404759178.

The spelling of 18013672 in words is "eighteen million, thirteen thousand, six hundred seventy-two".