18865672 has 16 divisors (see below), whose sum is σ = 40426560. Its totient is φ = 8085264.

The previous prime is 18865669. The next prime is 18865673. The reversal of 18865672 is 27656881.

It is a super-3 number, since 3×18865672³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (18865673) 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 3 ways as a sum of consecutive naturals, for example, 168388 + ... + 168499.

It is an arithmetic number, because the mean of its divisors is an integer number (2526660).

Almost surely, 2^18865672 is an apocalyptic number.

It is an amenable number.

18865672 is an abundant number, since it is smaller than the sum of its proper divisors (21560888).

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

18865672 is a wasteful number, since it uses less digits than its factorization.

18865672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336900 (or 336896 counting only the distinct ones).

The product of its digits is 161280, while the sum is 43.

The square root of 18865672 is about 4343.4631344124. The cubic root of 18865672 is about 266.2098331113.

The spelling of 18865672 in words is "eighteen million, eight hundred sixty-five thousand, six hundred seventy-two".