18666686836852 has 24 divisors (see below), whose sum is σ = 32771893714560. Its totient is φ = 9303331664640.

The previous prime is 18666686836801. The next prime is 18666686836913. The reversal of 18666686836852 is 25863868666681.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3642924 + ... + 7113667.

It is an arithmetic number, because the mean of its divisors is an integer number (1365495571440).

Almost surely, 2^{18666686836852} is an apocalyptic number.

It is an amenable number.

18666686836852 is a deficient number, since it is larger than the sum of its proper divisors (14105206877708).

18666686836852 is a wasteful number, since it uses less digits than its factorization.

18666686836852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10757991 (or 10757989 counting only the distinct ones).

The product of its digits is 5733089280, while the sum is 79.

The spelling of 18666686836852 in words is "eighteen trillion, six hundred sixty-six billion, six hundred eighty-six million, eight hundred thirty-six thousand, eight hundred fifty-two".