18744976913866 has 16 divisors (see below), whose sum is σ = 32661037059840. Its totient is φ = 7901863804080.

The previous prime is 18744976913849. The next prime is 18744976914089. The reversal of 18744976913866 is 66831967944781.

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, 10974809986 + ... + 10974811693.

It is an arithmetic number, because the mean of its divisors is an integer number (2041314816240).

Almost surely, 2^{18744976913866} is an apocalyptic number.

18744976913866 is a deficient number, since it is larger than the sum of its proper divisors (13916060145974).

18744976913866 is a wasteful number, since it uses less digits than its factorization.

18744976913866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21949621749.

The product of its digits is 2633637888, while the sum is 79.

The spelling of 18744976913866 in words is "eighteen trillion, seven hundred forty-four billion, nine hundred seventy-six million, nine hundred thirteen thousand, eight hundred sixty-six".