18668701852 has 12 divisors (see below), whose sum is σ = 32673382560. Its totient is φ = 9333449696.

The previous prime is 18668701841. The next prime is 18668701903. The reversal of 18668701852 is 25810786681.

It is a self number, because there is not a number n which added to its sum of digits gives 18668701852.

It is a congruent number.

It is an unprimeable number.

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, 177577 + ... + 262432.

It is an arithmetic number, because the mean of its divisors is an integer number (2722781880).

Almost surely, 2^18668701852 is an apocalyptic number.

It is an amenable number.

18668701852 is a deficient number, since it is larger than the sum of its proper divisors (14004680708).

18668701852 is a wasteful number, since it uses less digits than its factorization.

18668701852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450620 (or 450618 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 52.

The spelling of 18668701852 in words is "eighteen billion, six hundred sixty-eight million, seven hundred one thousand, eight hundred fifty-two".