19499157699 has 16 divisors (see below), whose sum is σ = 30089118720. Its totient is φ = 11001332160.

The previous prime is 19499157659. The next prime is 19499157707. The reversal of 19499157699 is 99675199491.

It is not a de Polignac number, because 19499157699 - 2⁹ = 19499157187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19499157659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5875122 + ... + 5878439.

It is an arithmetic number, because the mean of its divisors is an integer number (1880569920).

Almost surely, 2^19499157699 is an apocalyptic number.

19499157699 is a deficient number, since it is larger than the sum of its proper divisors (10589961021).

19499157699 is a wasteful number, since it uses less digits than its factorization.

19499157699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11753650.

The product of its digits is 49601160, while the sum is 69.

The spelling of 19499157699 in words is "nineteen billion, four hundred ninety-nine million, one hundred fifty-seven thousand, six hundred ninety-nine".