17980347931 has 32 divisors (see below), whose sum is σ = 22302379008. Its totient is φ = 14115530880.

The previous prime is 17980347923. The next prime is 17980347937. The reversal of 17980347931 is 13974308971.

It is a cyclic number.

It is not a de Polignac number, because 17980347931 - 2³ = 17980347923 is a prime.

It is a super-2 number, since 2×17980347931² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (17980347937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11444376 + ... + 11445946.

It is an arithmetic number, because the mean of its divisors is an integer number (696949344).

Almost surely, 2^17980347931 is an apocalyptic number.

17980347931 is a deficient number, since it is larger than the sum of its proper divisors (4322031077).

17980347931 is a wasteful number, since it uses less digits than its factorization.

17980347931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491.

The product of its (nonzero) digits is 1143072, while the sum is 52.

The spelling of 17980347931 in words is "seventeen billion, nine hundred eighty million, three hundred forty-seven thousand, nine hundred thirty-one".