19208950849 has 16 divisors (see below), whose sum is σ = 21395223360. Its totient is φ = 17099458560.

The previous prime is 19208950843. The next prime is 19208950967. The reversal of 19208950849 is 94805980291.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19208950849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19208950849.

It is not an unprimeable number, because it can be changed into a prime (19208950843) 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, 25569 + ... + 197665.

It is an arithmetic number, because the mean of its divisors is an integer number (1337201460).

Almost surely, 2^19208950849 is an apocalyptic number.

It is an amenable number.

19208950849 is a deficient number, since it is larger than the sum of its proper divisors (2186272511).

19208950849 is a wasteful number, since it uses less digits than its factorization.

19208950849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172320.

The product of its (nonzero) digits is 1866240, while the sum is 55.

The spelling of 19208950849 in words is "nineteen billion, two hundred eight million, nine hundred fifty thousand, eight hundred forty-nine".