17397940868 has 96 divisors (see below), whose sum is σ = 38911961088. Its totient is φ = 6608851200.

The previous prime is 17397940867. The next prime is 17397940877. The reversal of 17397940868 is 86804979371.

It is a self number, because there is not a number n which added to its sum of digits gives 17397940868.

It is not an unprimeable number, because it can be changed into a prime (17397940867) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11746688 + ... + 11748168.

It is an arithmetic number, because the mean of its divisors is an integer number (405332928).

Almost surely, 2^17397940868 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 17397940868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19455980544).

17397940868 is an abundant number, since it is smaller than the sum of its proper divisors (21514020220).

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

17397940868 is a wasteful number, since it uses less digits than its factorization.

17397940868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2433 (or 2431 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 62.

The spelling of 17397940868 in words is "seventeen billion, three hundred ninety-seven million, nine hundred forty thousand, eight hundred sixty-eight".