18009672 has 32 divisors (see below), whose sum is σ = 45571680. Its totient is φ = 5930240.

The previous prime is 18009661. The next prime is 18009679. The reversal of 18009672 is 27690081.

It is not an unprimeable number, because it can be changed into a prime (18009679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2529 + ... + 6512.

It is an arithmetic number, because the mean of its divisors is an integer number (1424115).

Almost surely, 2^18009672 is an apocalyptic number.

18009672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18009672 is an abundant number, since it is smaller than the sum of its proper divisors (27562008).

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

18009672 is a wasteful number, since it uses less digits than its factorization.

18009672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9133 (or 9129 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 18009672 is about 4243.7803901710. The cubic root of 18009672 is about 262.1210714062.

It can be divided in two parts, 18009 and 672, that added together give a palindrome (18681).

The spelling of 18009672 in words is "eighteen million, nine thousand, six hundred seventy-two".