18395726668 has 24 divisors (see below), whose sum is σ = 35126650944. Its totient is φ = 8359899600.

The previous prime is 18395726617. The next prime is 18395726677. The reversal of 18395726668 is 86662759381.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 174571 + ... + 259357.

It is an arithmetic number, because the mean of its divisors is an integer number (1463610456).

Almost surely, 2^18395726668 is an apocalyptic number.

It is an amenable number.

18395726668 is a deficient number, since it is larger than the sum of its proper divisors (16730924276).

18395726668 is a wasteful number, since it uses less digits than its factorization.

18395726668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89733 (or 89731 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 61.

The spelling of 18395726668 in words is "eighteen billion, three hundred ninety-five million, seven hundred twenty-six thousand, six hundred sixty-eight".