18686705372 has 24 divisors (see below), whose sum is σ = 33721798656. Its totient is φ = 9055766448.

The previous prime is 18686705347. The next prime is 18686705377. The reversal of 18686705372 is 27350768681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18686705377) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 463148 + ... + 501875.

It is an arithmetic number, because the mean of its divisors is an integer number (1405074944).

Almost surely, 2^18686705372 is an apocalyptic number.

It is an amenable number.

18686705372 is a deficient number, since it is larger than the sum of its proper divisors (15035093284).

18686705372 is a wasteful number, since it uses less digits than its factorization.

18686705372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965177 (or 965175 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 53.

The spelling of 18686705372 in words is "eighteen billion, six hundred eighty-six million, seven hundred five thousand, three hundred seventy-two".