18266804 has 12 divisors (see below), whose sum is σ = 32182500. Its totient is φ = 9071808.

The previous prime is 18266797. The next prime is 18266827. The reversal of 18266804 is 40866281.

It can be written as a sum of positive squares in 2 ways, for example, as 1060900 + 17205904 = 1030^2 + 4148^2 .

It is a super-2 number, since 2×18266804² = 667352256748832, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 14729 + ... + 15920.

It is an arithmetic number, because the mean of its divisors is an integer number (2681875).

Almost surely, 2^18266804 is an apocalyptic number.

It is an amenable number.

18266804 is a deficient number, since it is larger than the sum of its proper divisors (13915696).

18266804 is a wasteful number, since it uses less digits than its factorization.

18266804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30802 (or 30800 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 18266804 is about 4273.9681795727. The cubic root of 18266804 is about 263.3626537169.

The spelling of 18266804 in words is "eighteen million, two hundred sixty-six thousand, eight hundred four".