18385366672 has 40 divisors (see below), whose sum is σ = 35969572800. Its totient is φ = 9103312512.

The previous prime is 18385366661. The next prime is 18385366679. The reversal of 18385366672 is 27666358381.

It is not an unprimeable number, because it can be changed into a prime (18385366679) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 705979 + ... + 731557.

It is an arithmetic number, because the mean of its divisors is an integer number (899239320).

Almost surely, 2^18385366672 is an apocalyptic number.

It is an amenable number.

18385366672 is a deficient number, since it is larger than the sum of its proper divisors (17584206128).

18385366672 is a wasteful number, since it uses less digits than its factorization.

18385366672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26023 (or 26017 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 55.

The spelling of 18385366672 in words is "eighteen billion, three hundred eighty-five million, three hundred sixty-six thousand, six hundred seventy-two".