18688793720786 has 16 divisors (see below), whose sum is σ = 32157032218560. Its totient is φ = 7979707991760.

The previous prime is 18688793720777. The next prime is 18688793720801. The reversal of 18688793720786 is 68702739788681.

It is a self number, because there is not a number n which added to its sum of digits gives 18688793720786.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2481248720 + ... + 2481256251.

It is an arithmetic number, because the mean of its divisors is an integer number (2009814513660).

Almost surely, 2^{18688793720786} is an apocalyptic number.

18688793720786 is a deficient number, since it is larger than the sum of its proper divisors (13468238497774).

18688793720786 is a wasteful number, since it uses less digits than its factorization.

18688793720786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4962505249.

The product of its (nonzero) digits is 2731180032, while the sum is 80.

The spelling of 18688793720786 in words is "eighteen trillion, six hundred eighty-eight billion, seven hundred ninety-three million, seven hundred twenty thousand, seven hundred eighty-six".