18011672 has 32 divisors (see below), whose sum is σ = 38831520. Its totient is φ = 7672320.

The previous prime is 18011671. The next prime is 18011743. The reversal of 18011672 is 27611081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18011671) 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, 9248 + ... + 11024.

It is an arithmetic number, because the mean of its divisors is an integer number (1213485).

Almost surely, 2^18011672 is an apocalyptic number.

It is an amenable number.

18011672 is an abundant number, since it is smaller than the sum of its proper divisors (20819848).

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

18011672 is a wasteful number, since it uses less digits than its factorization.

18011672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971 (or 1967 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 18011672 is about 4244.0160225899. The cubic root of 18011672 is about 262.1307740211.

The spelling of 18011672 in words is "eighteen million, eleven thousand, six hundred seventy-two".