18442511866 has 32 divisors (see below), whose sum is σ = 29432937600. Its totient is φ = 8647514304.

The previous prime is 18442511849. The next prime is 18442511929. The reversal of 18442511866 is 66811524481.

It is a Harshad number since it is a multiple of its sum of digits (46).

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 15 ways as a sum of consecutive naturals, for example, 5588685 + ... + 5591983.

It is an arithmetic number, because the mean of its divisors is an integer number (919779300).

Almost surely, 2^18442511866 is an apocalyptic number.

18442511866 is a deficient number, since it is larger than the sum of its proper divisors (10990425734).

18442511866 is a wasteful number, since it uses less digits than its factorization.

18442511866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5670.

The product of its digits is 368640, while the sum is 46.

The spelling of 18442511866 in words is "eighteen billion, four hundred forty-two million, five hundred eleven thousand, eight hundred sixty-six".