19578212825 has 12 divisors (see below), whose sum is σ = 24841566288. Its totient is φ = 15298323600.

The previous prime is 19578212783. The next prime is 19578212833. The reversal of 19578212825 is 52821287591.

It is not a de Polignac number, because 19578212825 - 2¹⁴ = 19578196441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9105071 + ... + 9107220.

It is an arithmetic number, because the mean of its divisors is an integer number (2070130524).

Almost surely, 2^19578212825 is an apocalyptic number.

It is an amenable number.

19578212825 is a deficient number, since it is larger than the sum of its proper divisors (5263353463).

19578212825 is a wasteful number, since it uses less digits than its factorization.

19578212825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18212344 (or 18212339 counting only the distinct ones).

The product of its digits is 806400, while the sum is 50.

The spelling of 19578212825 in words is "nineteen billion, five hundred seventy-eight million, two hundred twelve thousand, eight hundred twenty-five".