19201820192 has 24 divisors (see below), whose sum is σ = 38150412300. Its totient is φ = 9512826624.

The previous prime is 19201820189. The next prime is 19201820201. The reversal of 19201820192 is 29102810291.

It can be written as a sum of positive squares in 2 ways, for example, as 15406767376 + 3795052816 = 124124^2 + 61604^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2749067 + ... + 2756042.

Almost surely, 2^19201820192 is an apocalyptic number.

It is an amenable number.

19201820192 is a deficient number, since it is larger than the sum of its proper divisors (18948592108).

19201820192 is a wasteful number, since it uses less digits than its factorization.

19201820192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5505228 (or 5505220 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 35.

Subtracting 19201820192 from its reverse (29102810291), we obtain a palindrome (9900990099).

The spelling of 19201820192 in words is "nineteen billion, two hundred one million, eight hundred twenty thousand, one hundred ninety-two".