19209422205 has 24 divisors (see below), whose sum is σ = 33468866808. Its totient is φ = 10191937536.

The previous prime is 19209422203. The next prime is 19209422209. The reversal of 19209422205 is 50222490291.

19209422205 is a `hidden beast` number, since 1 + 9 + 20 + 9 + 422 + 205 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 70913241 + 19138508964 = 8421^2 + 138342^2 .

It is not a de Polignac number, because 19209422205 - 2¹ = 19209422203 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19209422205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19209422203) 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 23 ways as a sum of consecutive naturals, for example, 1097212 + ... + 1114581.

It is an arithmetic number, because the mean of its divisors is an integer number (1394536117).

Almost surely, 2^19209422205 is an apocalyptic number.

19209422205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19209422205 is a deficient number, since it is larger than the sum of its proper divisors (14259444603).

19209422205 is a wasteful number, since it uses less digits than its factorization.

19209422205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2211997 (or 2211994 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 19209422205 in words is "nineteen billion, two hundred nine million, four hundred twenty-two thousand, two hundred five".