19099956499 has 16 divisors (see below), whose sum is σ = 21359923200. Its totient is φ = 16959768480.

The previous prime is 19099956497. The next prime is 19099956503. The reversal of 19099956499 is 99465999091.

It is a cyclic number.

It is not a de Polignac number, because 19099956499 - 2¹ = 19099956497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19099956497) 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, 74599 + ... + 209200.

It is an arithmetic number, because the mean of its divisors is an integer number (1334995200).

Almost surely, 2^19099956499 is an apocalyptic number.

19099956499 is a deficient number, since it is larger than the sum of its proper divisors (2259966701).

19099956499 is a wasteful number, since it uses less digits than its factorization.

19099956499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284010.

The product of its (nonzero) digits is 63772920, while the sum is 70.

The spelling of 19099956499 in words is "nineteen billion, ninety-nine million, nine hundred fifty-six thousand, four hundred ninety-nine".