17995471819 has 32 divisors (see below), whose sum is σ = 20287713600. Its totient is φ = 15847587840.

The previous prime is 17995471789. The next prime is 17995471829. The reversal of 17995471819 is 91817459971.

It is a cyclic number.

It is not a de Polignac number, because 17995471819 - 2¹⁷ = 17995340747 is a prime.

It is a super-2 number, since 2×17995471819² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17995471829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27306912 + ... + 27307570.

It is an arithmetic number, because the mean of its divisors is an integer number (633991050).

Almost surely, 2^17995471819 is an apocalyptic number.

17995471819 is a deficient number, since it is larger than the sum of its proper divisors (2292241781).

17995471819 is a wasteful number, since it uses less digits than its factorization.

17995471819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455.

The product of its digits is 5715360, while the sum is 61.

The spelling of 17995471819 in words is "seventeen billion, nine hundred ninety-five million, four hundred seventy-one thousand, eight hundred nineteen".