18716906928439 has 4 divisors (see below), whose sum is σ = 18718227545656. Its totient is φ = 18715586311224.

The previous prime is 18716906928397. The next prime is 18716906928449. The reversal of 18716906928439 is 93482960961781.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18716906928439 - 2²⁵ = 18716873374007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18716906928449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660287349 + ... + 660315694.

It is an arithmetic number, because the mean of its divisors is an integer number (4679556886414).

Almost surely, 2^{18716906928439} is an apocalyptic number.

18716906928439 is a deficient number, since it is larger than the sum of its proper divisors (1320617217).

18716906928439 is a wasteful number, since it uses less digits than its factorization.

18716906928439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320617216.

The product of its (nonzero) digits is 282175488, while the sum is 73.

The spelling of 18716906928439 in words is "eighteen trillion, seven hundred sixteen billion, nine hundred six million, nine hundred twenty-eight thousand, four hundred thirty-nine".