18249864 has 16 divisors (see below), whose sum is σ = 45624720. Its totient is φ = 6083280.

The previous prime is 18249841. The next prime is 18249877. The reversal of 18249864 is 46894281.

It is a plaindrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380182 + ... + 380229.

It is an arithmetic number, because the mean of its divisors is an integer number (2851545).

Almost surely, 2^18249864 is an apocalyptic number.

It is an amenable number.

18249864 is an abundant number, since it is smaller than the sum of its proper divisors (27374856).

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

18249864 is a wasteful number, since it uses less digits than its factorization.

18249864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760420 (or 760416 counting only the distinct ones).

The product of its digits is 110592, while the sum is 42.

The square root of 18249864 is about 4271.9859550331. The cubic root of 18249864 is about 263.2812174100.

The spelling of 18249864 in words is "eighteen million, two hundred forty-nine thousand, eight hundred sixty-four".