19385592608 has 54 divisors (see below), whose sum is σ = 38656960587. Its totient is φ = 9569534400.

The previous prime is 19385592529. The next prime is 19385592637. The reversal of 19385592608 is 80629558391.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 9692796304 + 9692796304 = 98452^2 + 98452^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=98452.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 118929935 + ... + 118930097.

Almost surely, 2^19385592608 is an apocalyptic number.

It is an amenable number.

19385592608 is a deficient number, since it is larger than the sum of its proper divisors (19271367979).

19385592608 is an frugal number, since it uses more digits than its factorization.

19385592608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 56.

The spelling of 19385592608 in words is "nineteen billion, three hundred eighty-five million, five hundred ninety-two thousand, six hundred eight".