18423766978716 has 48 divisors (see below), whose sum is σ = 49655500312320. Its totient is φ = 5254550296320.

The previous prime is 18423766978711. The next prime is 18423766978717. The reversal of 18423766978716 is 61787966732481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18423766978711) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4105115176 + ... + 4105119663.

It is an arithmetic number, because the mean of its divisors is an integer number (1034489589840).

Almost surely, 2^{18423766978716} is an apocalyptic number.

It is an amenable number.

18423766978716 is an abundant number, since it is smaller than the sum of its proper divisors (31231733333604).

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

18423766978716 is a wasteful number, since it uses less digits than its factorization.

18423766978716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8210234874 (or 8210234872 counting only the distinct ones).

The product of its digits is 1024192512, while the sum is 75.

The spelling of 18423766978716 in words is "eighteen trillion, four hundred twenty-three billion, seven hundred sixty-six million, nine hundred seventy-eight thousand, seven hundred sixteen".