17979974376 has 256 divisors, whose sum is σ = 56326233600. Its totient is φ = 4656807936.

The previous prime is 17979974371. The next prime is 17979974407. The reversal of 17979974376 is 67347997971.

It is a self number, because there is not a number n which added to its sum of digits gives 17979974376.

It is not an unprimeable number, because it can be changed into a prime (17979974371) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 45289410 + ... + 45289806.

It is an arithmetic number, because the mean of its divisors is an integer number (220024350).

Almost surely, 2^17979974376 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 17979974376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28163116800).

17979974376 is an abundant number, since it is smaller than the sum of its proper divisors (38346259224).

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

17979974376 is a wasteful number, since it uses less digits than its factorization.

17979974376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748 (or 744 counting only the distinct ones).

The product of its digits is 126023688, while the sum is 69.

The spelling of 17979974376 in words is "seventeen billion, nine hundred seventy-nine million, nine hundred seventy-four thousand, three hundred seventy-six".