19128409204 has 6 divisors (see below), whose sum is σ = 33474716114. Its totient is φ = 9564204600.

The previous prime is 19128409187. The next prime is 19128409213. The reversal of 19128409204 is 40290482191.

It can be written as a sum of positive squares in only one way, i.e., 16218022500 + 2910386704 = 127350^2 + 53948^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2391051147 + ... + 2391051154.

Almost surely, 2^19128409204 is an apocalyptic number.

It is an amenable number.

19128409204 is a deficient number, since it is larger than the sum of its proper divisors (14346306910).

19128409204 is a wasteful number, since it uses less digits than its factorization.

19128409204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4782102305 (or 4782102303 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 19128409204 in words is "nineteen billion, one hundred twenty-eight million, four hundred nine thousand, two hundred four".