18726508068 has 12 divisors (see below), whose sum is σ = 43695185520. Its totient is φ = 6242169352.

The previous prime is 18726508061. The next prime is 18726508081. The reversal of 18726508068 is 86080562781.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 18726508068.

It is not an unprimeable number, because it can be changed into a prime (18726508061) 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 3 ways as a sum of consecutive naturals, for example, 780271158 + ... + 780271181.

It is an arithmetic number, because the mean of its divisors is an integer number (3641265460).

Almost surely, 2^18726508068 is an apocalyptic number.

It is an amenable number.

18726508068 is an abundant number, since it is smaller than the sum of its proper divisors (24968677452).

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

18726508068 is a wasteful number, since it uses less digits than its factorization.

18726508068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560542346 (or 1560542344 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 51.

The spelling of 18726508068 in words is "eighteen billion, seven hundred twenty-six million, five hundred eight thousand, sixty-eight".