18517666852 has 12 divisors (see below), whose sum is σ = 33451269376. Its totient is φ = 8960161320.

The previous prime is 18517666847. The next prime is 18517666859. The reversal of 18517666852 is 25866671581.

It is a junction number, because it is equal to n+sod(n) for n = 18517666793 and 18517666802.

It is not an unprimeable number, because it can be changed into a prime (18517666859) 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, 74667888 + ... + 74668135.

Almost surely, 2^18517666852 is an apocalyptic number.

It is an amenable number.

18517666852 is a deficient number, since it is larger than the sum of its proper divisors (14933602524).

18517666852 is a wasteful number, since it uses less digits than its factorization.

18517666852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149336058 (or 149336056 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 55.

The spelling of 18517666852 in words is "eighteen billion, five hundred seventeen million, six hundred sixty-six thousand, eight hundred fifty-two".