2118397875684 has 24 divisors (see below), whose sum is σ = 5203082502240. Its totient is φ = 668967750144.

The previous prime is 2118397875683. The next prime is 2118397875691. The reversal of 2118397875684 is 4865787938112.

It is not an unprimeable number, because it can be changed into a prime (2118397875683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4645609149 + ... + 4645609604.

It is an arithmetic number, because the mean of its divisors is an integer number (216795104260).

Almost surely, 2^{2118397875684} is an apocalyptic number.

It is an amenable number.

2118397875684 is an abundant number, since it is smaller than the sum of its proper divisors (3084684626556).

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

2118397875684 is a wasteful number, since it uses less digits than its factorization.

2118397875684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9291218779 (or 9291218777 counting only the distinct ones).

The product of its digits is 162570240, while the sum is 69.

The spelling of 2118397875684 in words is "two trillion, one hundred eighteen billion, three hundred ninety-seven million, eight hundred seventy-five thousand, six hundred eighty-four".