20204320305 has 16 divisors (see below), whose sum is σ = 34813598400. Its totient is φ = 9946742208.

The previous prime is 20204320289. The next prime is 20204320319. The reversal of 20204320305 is 50302340202.

It is not a de Polignac number, because 20204320305 - 2⁴ = 20204320289 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51805755 + ... + 51806144.

It is an arithmetic number, because the mean of its divisors is an integer number (2175849900).

Almost surely, 2^20204320305 is an apocalyptic number.

It is an amenable number.

20204320305 is a deficient number, since it is larger than the sum of its proper divisors (14609278095).

20204320305 is a wasteful number, since it uses less digits than its factorization.

20204320305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103611920.

The product of its (nonzero) digits is 1440, while the sum is 21.

Adding to 20204320305 its reverse (50302340202), we get a palindrome (70506660507).

The spelling of 20204320305 in words is "twenty billion, two hundred four million, three hundred twenty thousand, three hundred five".