18065864 has 8 divisors (see below), whose sum is σ = 33873510. Its totient is φ = 9032928.

The previous prime is 18065857. The next prime is 18065881. The reversal of 18065864 is 46856081.

It can be written as a sum of positive squares in only one way, i.e., 18062500 + 3364 = 4250^2 + 58^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1129109 + ... + 1129124.

Almost surely, 2^18065864 is an apocalyptic number.

It is an amenable number.

18065864 is a deficient number, since it is larger than the sum of its proper divisors (15807646).

18065864 is a wasteful number, since it uses less digits than its factorization.

18065864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2258239 (or 2258235 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 18065864 is about 4250.3957462806. The cubic root of 18065864 is about 262.3934031283.

The spelling of 18065864 in words is "eighteen million, sixty-five thousand, eight hundred sixty-four".