18718711324208 has 40 divisors (see below), whose sum is σ = 43250687040768. Its totient is φ = 7673508988992.

The previous prime is 18718711324151. The next prime is 18718711324211. The reversal of 18718711324208 is 80242311781781.

It is a self number, because there is not a number n which added to its sum of digits gives 18718711324208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3633287666 + ... + 3633292817.

Almost surely, 2^{18718711324208} is an apocalyptic number.

It is an amenable number.

18718711324208 is an abundant number, since it is smaller than the sum of its proper divisors (24531975716560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18718711324208 is a wasteful number, since it uses less digits than its factorization.

18718711324208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7266580521 (or 7266580515 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 53.

The spelling of 18718711324208 in words is "eighteen trillion, seven hundred eighteen billion, seven hundred eleven million, three hundred twenty-four thousand, two hundred eight".