18664512368 has 10 divisors (see below), whose sum is σ = 36162492744. Its totient is φ = 9332256176.

The previous prime is 18664512331. The next prime is 18664512403. The reversal of 18664512368 is 86321546681.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583265996 + ... + 583266027.

Almost surely, 2^18664512368 is an apocalyptic number.

It is an amenable number.

18664512368 is a deficient number, since it is larger than the sum of its proper divisors (17497980376).

18664512368 is a wasteful number, since it uses less digits than its factorization.

18664512368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166532031 (or 1166532025 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 50.

The spelling of 18664512368 in words is "eighteen billion, six hundred sixty-four million, five hundred twelve thousand, three hundred sixty-eight".