18847793264 has 20 divisors (see below), whose sum is σ = 36526040904. Its totient is φ = 9421718208.

The previous prime is 18847793243. The next prime is 18847793287. The reversal of 18847793264 is 46239774881.

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, 63602 + ... + 204305.

Almost surely, 2^18847793264 is an apocalyptic number.

It is an amenable number.

18847793264 is a deficient number, since it is larger than the sum of its proper divisors (17678247640).

18847793264 is a wasteful number, since it uses less digits than its factorization.

18847793264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272312 (or 272306 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 59.

The spelling of 18847793264 in words is "eighteen billion, eight hundred forty-seven million, seven hundred ninety-three thousand, two hundred sixty-four".