18812718594 has 12 divisors (see below), whose sum is σ = 40760890326. Its totient is φ = 6270906192.

The previous prime is 18812718563. The next prime is 18812718599. The reversal of 18812718594 is 49581721881.

18812718594 is a `hidden beast` number, since 18 + 8 + 1 + 27 + 18 + 594 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10699212969 + 8113505625 = 103437^2 + 90075^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18812718594.

It is not an unprimeable number, because it can be changed into a prime (18812718599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 522575499 + ... + 522575534.

Almost surely, 2^18812718594 is an apocalyptic number.

18812718594 is an abundant number, since it is smaller than the sum of its proper divisors (21948171732).

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

18812718594 is a wasteful number, since it uses less digits than its factorization.

18812718594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045151041 (or 1045151038 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 54.

The spelling of 18812718594 in words is "eighteen billion, eight hundred twelve million, seven hundred eighteen thousand, five hundred ninety-four".