18072372 has 12 divisors (see below), whose sum is σ = 42168896. Its totient is φ = 6024120.

The previous prime is 18072371. The next prime is 18072389. The reversal of 18072372 is 27327081.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×18072372² = 653221259412768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18072371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 753004 + ... + 753027.

Almost surely, 2^18072372 is an apocalyptic number.

18072372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18072372 is an abundant number, since it is smaller than the sum of its proper divisors (24096524).

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

18072372 is a wasteful number, since it uses less digits than its factorization.

18072372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506038 (or 1506036 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 18072372 is about 4251.1612531166. The cubic root of 18072372 is about 262.4249073187.

The spelling of 18072372 in words is "eighteen million, seventy-two thousand, three hundred seventy-two".