18667821068 has 24 divisors (see below), whose sum is σ = 35189438592. Its totient is φ = 8614013184.

The previous prime is 18667821031. The next prime is 18667821077. The reversal of 18667821068 is 86012876681.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213221 + ... + 287747.

It is an arithmetic number, because the mean of its divisors is an integer number (1466226608).

Almost surely, 2^18667821068 is an apocalyptic number.

It is an amenable number.

18667821068 is a deficient number, since it is larger than the sum of its proper divisors (16521617524).

18667821068 is a wasteful number, since it uses less digits than its factorization.

18667821068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79361 (or 79359 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 53.

The spelling of 18667821068 in words is "eighteen billion, six hundred sixty-seven million, eight hundred twenty-one thousand, sixty-eight".