17945189108 has 144 divisors (see below), whose sum is σ = 41404683264. Its totient is φ = 6652800000.

The previous prime is 17945189089. The next prime is 17945189113. The reversal of 17945189108 is 80198154971.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 17945189108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6405308 + ... + 6408108.

Almost surely, 2^17945189108 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 17945189108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20702341632).

17945189108 is an abundant number, since it is smaller than the sum of its proper divisors (23459494156).

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

17945189108 is a wasteful number, since it uses less digits than its factorization.

17945189108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2926 (or 2913 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 53.

The spelling of 17945189108 in words is "seventeen billion, nine hundred forty-five million, one hundred eighty-nine thousand, one hundred eight".