19503828209 has 2 divisors, whose sum is σ = 19503828210. Its totient is φ = 19503828208.

The previous prime is 19503828131. The next prime is 19503828251. The reversal of 19503828209 is 90282830591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12950440000 + 6553388209 = 113800^2 + 80953^2 .

It is a cyclic number.

It is not a de Polignac number, because 19503828209 - 2⁸ = 19503827953 is a prime.

It is not a weakly prime, because it can be changed into another prime (19503828709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9751914104 + 9751914105.

It is an arithmetic number, because the mean of its divisors is an integer number (9751914105).

Almost surely, 2^19503828209 is an apocalyptic number.

It is an amenable number.

19503828209 is a deficient number, since it is larger than the sum of its proper divisors (1).

19503828209 is an equidigital number, since it uses as much as digits as its factorization.

19503828209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 47.

It can be divided in two parts, 1950382 and 8209, that added together give a palindrome (1958591).

The spelling of 19503828209 in words is "nineteen billion, five hundred three million, eight hundred twenty-eight thousand, two hundred nine".