18135326668 has 48 divisors (see below), whose sum is σ = 33804237600. Its totient is φ = 8496714240.

The previous prime is 18135326659. The next prime is 18135326687. The reversal of 18135326668 is 86662353181.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1750263 + ... + 1760593.

It is an arithmetic number, because the mean of its divisors is an integer number (704254950).

Almost surely, 2^18135326668 is an apocalyptic number.

It is an amenable number.

18135326668 is a deficient number, since it is larger than the sum of its proper divisors (15668910932).

18135326668 is a wasteful number, since it uses less digits than its factorization.

18135326668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10810 (or 10808 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 49.

The spelling of 18135326668 in words is "eighteen billion, one hundred thirty-five million, three hundred twenty-six thousand, six hundred sixty-eight".