17994879319858 has 16 divisors (see below), whose sum is σ = 31131377069760. Its totient is φ = 7641338006736.

The previous prime is 17994879319853. The next prime is 17994879319867. The reversal of 17994879319858 is 85891397849971.

It is not an unprimeable number, because it can be changed into a prime (17994879319853) 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 7 ways as a sum of consecutive naturals, for example, 5896092616 + ... + 5896095667.

It is an arithmetic number, because the mean of its divisors is an integer number (1945711066860).

Almost surely, 2^{17994879319858} is an apocalyptic number.

17994879319858 is a deficient number, since it is larger than the sum of its proper divisors (13136497749902).

17994879319858 is a wasteful number, since it uses less digits than its factorization.

17994879319858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11792188401.

The product of its digits is 9876142080, while the sum is 88.

The spelling of 17994879319858 in words is "seventeen trillion, nine hundred ninety-four billion, eight hundred seventy-nine million, three hundred nineteen thousand, eight hundred fifty-eight".