18529864 has 64 divisors (see below), whose sum is σ = 39657600. Its totient is φ = 8064000.

The previous prime is 18529837. The next prime is 18529867. The reversal of 18529864 is 46892581.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18529864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18529867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183414 + ... + 183514.

It is an arithmetic number, because the mean of its divisors is an integer number (619650).

Almost surely, 2^18529864 is an apocalyptic number.

It is an amenable number.

18529864 is an abundant number, since it is smaller than the sum of its proper divisors (21127736).

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

18529864 is a wasteful number, since it uses less digits than its factorization.

18529864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 210 counting only the distinct ones).

The product of its digits is 138240, while the sum is 43.

The square root of 18529864 is about 4304.6328531014. The cubic root of 18529864 is about 264.6208604523.

The spelling of 18529864 in words is "eighteen million, five hundred twenty-nine thousand, eight hundred sixty-four".