18274664 has 16 divisors (see below), whose sum is σ = 34313220. Its totient is φ = 9124480.

The previous prime is 18274661. The next prime is 18274679. The reversal of 18274664 is 46647281.

It can be written as a sum of positive squares in 2 ways, for example, as 17724100 + 550564 = 4210^2 + 742^2 .

It is not an unprimeable number, because it can be changed into a prime (18274661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7412 + ... + 9564.

Almost surely, 2^18274664 is an apocalyptic number.

It is an amenable number.

18274664 is a deficient number, since it is larger than the sum of its proper divisors (16038556).

18274664 is a wasteful number, since it uses less digits than its factorization.

18274664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3220 (or 3216 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 18274664 is about 4274.8876008616. The cubic root of 18274664 is about 263.4004222947.

The spelling of 18274664 in words is "eighteen million, two hundred seventy-four thousand, six hundred sixty-four".