18701666852 has 24 divisors (see below), whose sum is σ = 36236071200. Its totient is φ = 8373879360.

The previous prime is 18701666849. The next prime is 18701666881. The reversal of 18701666852 is 25866610781.

It is a self number, because there is not a number n which added to its sum of digits gives 18701666852.

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, 3168977 + ... + 3174872.

It is an arithmetic number, because the mean of its divisors is an integer number (1509836300).

Almost surely, 2^18701666852 is an apocalyptic number.

It is an amenable number.

18701666852 is a deficient number, since it is larger than the sum of its proper divisors (17534404348).

18701666852 is a wasteful number, since it uses less digits than its factorization.

18701666852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6343931 (or 6343929 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 18701666852 in words is "eighteen billion, seven hundred one million, six hundred sixty-six thousand, eight hundred fifty-two".