18999223103312 has 20 divisors (see below), whose sum is σ = 36815910336660. Its totient is φ = 9498343016448.

The previous prime is 18999223103309. The next prime is 18999223103353. The reversal of 18999223103312 is 21330132299981.

It can be written as a sum of positive squares in 2 ways, for example, as 11499315052096 + 7499908051216 = 3391064^2 + 2738596^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 79159883 + ... + 79399530.

It is an arithmetic number, because the mean of its divisors is an integer number (1840795516833).

Almost surely, 2^{18999223103312} is an apocalyptic number.

It is an amenable number.

18999223103312 is a deficient number, since it is larger than the sum of its proper divisors (17816687233348).

18999223103312 is a wasteful number, since it uses less digits than its factorization.

18999223103312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158566910 (or 158566904 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 53.

The spelling of 18999223103312 in words is "eighteen trillion, nine hundred ninety-nine billion, two hundred twenty-three million, one hundred three thousand, three hundred twelve".