19117297445 has 16 divisors (see below), whose sum is σ = 23091602688. Its totient is φ = 15193382400.

The previous prime is 19117297439. The next prime is 19117297489. The reversal of 19117297445 is 54479271191.

It is not a de Polignac number, because 19117297445 - 2⁸ = 19117297189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19117297393 and 19117297402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1678520 + ... + 1689870.

It is an arithmetic number, because the mean of its divisors is an integer number (1443225168).

Almost surely, 2^19117297445 is an apocalyptic number.

It is an amenable number.

19117297445 is a deficient number, since it is larger than the sum of its proper divisors (3974305243).

19117297445 is a wasteful number, since it uses less digits than its factorization.

19117297445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13540.

The product of its digits is 635040, while the sum is 50.

The spelling of 19117297445 in words is "nineteen billion, one hundred seventeen million, two hundred ninety-seven thousand, four hundred forty-five".