18389666623012 has 48 divisors (see below), whose sum is σ = 32420411352000. Its totient is φ = 9127000358784.

The previous prime is 18389666622989. The next prime is 18389666623019. The reversal of 18389666623012 is 21032666698381.

It is a super-2 number, since 2×18389666623012² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18389666623019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 354788314 + ... + 354840142.

It is an arithmetic number, because the mean of its divisors is an integer number (675425236500).

Almost surely, 2^{18389666623012} is an apocalyptic number.

It is an amenable number.

18389666623012 is a deficient number, since it is larger than the sum of its proper divisors (14030744728988).

18389666623012 is a wasteful number, since it uses less digits than its factorization.

18389666623012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53308 (or 53306 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 61.

The spelling of 18389666623012 in words is "eighteen trillion, three hundred eighty-nine billion, six hundred sixty-six million, six hundred twenty-three thousand, twelve".