17994179728 has 80 divisors (see below), whose sum is σ = 41153080320. Its totient is φ = 7461836928.

The previous prime is 17994179719. The next prime is 17994179761. The reversal of 17994179728 is 82797149971.

It is a self number, because there is not a number n which added to its sum of digits gives 17994179728.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 497853 + ... + 532771.

It is an arithmetic number, because the mean of its divisors is an integer number (514413504).

Almost surely, 2^17994179728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 17994179728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20576540160).

17994179728 is an abundant number, since it is smaller than the sum of its proper divisors (23158900592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

17994179728 is a wasteful number, since it uses less digits than its factorization.

17994179728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35084 (or 35078 counting only the distinct ones).

The product of its digits is 16003008, while the sum is 64.

The spelling of 17994179728 in words is "seventeen billion, nine hundred ninety-four million, one hundred seventy-nine thousand, seven hundred twenty-eight".