17957968209 has 12 divisors (see below), whose sum is σ = 25943251152. Its totient is φ = 11970149400.

The previous prime is 17957968177. The next prime is 17957968211. The reversal of 17957968209 is 90286975971.

It is not a de Polignac number, because 17957968209 - 2⁵ = 17957968177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (17957968219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88887 + ... + 209324.

It is an arithmetic number, because the mean of its divisors is an integer number (2161937596).

Almost surely, 2^17957968209 is an apocalyptic number.

It is an amenable number.

17957968209 is a deficient number, since it is larger than the sum of its proper divisors (7985282943).

17957968209 is a wasteful number, since it uses less digits than its factorization.

17957968209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304908 (or 304905 counting only the distinct ones).

The product of its (nonzero) digits is 17146080, while the sum is 63.

The spelling of 17957968209 in words is "seventeen billion, nine hundred fifty-seven million, nine hundred sixty-eight thousand, two hundred nine".