17912919507 has 16 divisors (see below), whose sum is σ = 27669795840. Its totient is φ = 10095734592.

The previous prime is 17912919487. The next prime is 17912919523. The reversal of 17912919507 is 70591921971.

It is a de Polignac number, because none of the positive numbers 2^k-17912919507 is a prime.

It is a super-2 number, since 2×17912919507² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 17912919507.

It is not an unprimeable number, because it can be changed into a prime (17912919527) 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 15 ways as a sum of consecutive naturals, for example, 5840907 + ... + 5843972.

It is an arithmetic number, because the mean of its divisors is an integer number (1729362240).

Almost surely, 2^17912919507 is an apocalyptic number.

17912919507 is a deficient number, since it is larger than the sum of its proper divisors (9756876333).

17912919507 is a wasteful number, since it uses less digits than its factorization.

17912919507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11684962.

The product of its (nonzero) digits is 357210, while the sum is 51.

The spelling of 17912919507 in words is "seventeen billion, nine hundred twelve million, nine hundred nineteen thousand, five hundred seven".