17985794922 has 12 divisors (see below), whose sum is σ = 38969222370. Its totient is φ = 5995264968.

The previous prime is 17985794899. The next prime is 17985794941. The reversal of 17985794922 is 22949758971.

17985794922 is a `hidden beast` number, since 1 + 7 + 98 + 57 + 9 + 492 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13888386801 + 4097408121 = 117849^2 + 64011^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 17985794922.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 499605397 + ... + 499605432.

Almost surely, 2^17985794922 is an apocalyptic number.

17985794922 is an abundant number, since it is smaller than the sum of its proper divisors (20983427448).

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

17985794922 is a wasteful number, since it uses less digits than its factorization.

17985794922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999210837 (or 999210834 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 63.

The spelling of 17985794922 in words is "seventeen billion, nine hundred eighty-five million, seven hundred ninety-four thousand, nine hundred twenty-two".