18361698668 has 24 divisors (see below), whose sum is σ = 32783407104. Its totient is φ = 8996446800.

The previous prime is 18361698643. The next prime is 18361698683. The reversal of 18361698668 is 86689616381.

It is a self number, because there is not a number n which added to its sum of digits gives 18361698668.

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, 128168 + ... + 230543.

It is an arithmetic number, because the mean of its divisors is an integer number (1365975296).

Almost surely, 2^18361698668 is an apocalyptic number.

It is an amenable number.

18361698668 is a deficient number, since it is larger than the sum of its proper divisors (14421708436).

18361698668 is a wasteful number, since it uses less digits than its factorization.

18361698668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358973 (or 358971 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 62.

The spelling of 18361698668 in words is "eighteen billion, three hundred sixty-one million, six hundred ninety-eight thousand, six hundred sixty-eight".