18798664 has 32 divisors (see below), whose sum is σ = 37107000. Its totient is φ = 8916480.

The previous prime is 18798653. The next prime is 18798671. The reversal of 18798664 is 46689781.

It can be written as a sum of positive squares in 4 ways, for example, as 14002564 + 4796100 = 3742^2 + 2190^2 .

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 11362 + ... + 12910.

Almost surely, 2^18798664 is an apocalyptic number.

It is an amenable number.

18798664 is a deficient number, since it is larger than the sum of its proper divisors (18308336).

18798664 is a wasteful number, since it uses less digits than its factorization.

18798664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633 (or 1629 counting only the distinct ones).

The product of its digits is 580608, while the sum is 49.

The square root of 18798664 is about 4335.7426122869. The cubic root of 18798664 is about 265.8942802599.

The spelling of 18798664 in words is "eighteen million, seven hundred ninety-eight thousand, six hundred sixty-four".