19528199317 has 6 divisors (see below), whose sum is σ = 21464880374. Its totient is φ = 17752908360.

The previous prime is 19528199309. The next prime is 19528199321. The reversal of 19528199317 is 71399182591.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19252672516 + 275526801 = 138754^2 + 16599^2 .

It is not a de Polignac number, because 19528199317 - 2³ = 19528199309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19528199347) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 80694918 + ... + 80695159.

Almost surely, 2^19528199317 is an apocalyptic number.

It is an amenable number.

19528199317 is a deficient number, since it is larger than the sum of its proper divisors (1936681057).

19528199317 is a wasteful number, since it uses less digits than its factorization.

19528199317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161390099 (or 161390088 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 55.

The spelling of 19528199317 in words is "nineteen billion, five hundred twenty-eight million, one hundred ninety-nine thousand, three hundred seventeen".