18782834838728 has 16 divisors (see below), whose sum is σ = 35217917125260. Its totient is φ = 9391390272000.

The previous prime is 18782834838727. The next prime is 18782834838737. The reversal of 18782834838728 is 82783843828781.

It can be written as a sum of positive squares in 2 ways, for example, as 15801404109604 + 2981430729124 = 3975098^2 + 1726682^2 .

It is not an unprimeable number, because it can be changed into a prime (18782834838727) 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, 285473 + ... + 6135728.

Almost surely, 2^{18782834838728} is an apocalyptic number.

It is an amenable number.

18782834838728 is a deficient number, since it is larger than the sum of its proper divisors (16435082286532).

18782834838728 is a wasteful number, since it uses less digits than its factorization.

18782834838728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6786848 (or 6786844 counting only the distinct ones).

The product of its digits is 1849688064, while the sum is 77.

The spelling of 18782834838728 in words is "eighteen trillion, seven hundred eighty-two billion, eight hundred thirty-four million, eight hundred thirty-eight thousand, seven hundred twenty-eight".