20304104505205 has 16 divisors (see below), whose sum is σ = 25305079415040. Its totient is φ = 15628229580352.

The previous prime is 20304104505107. The next prime is 20304104505319. The reversal of 20304104505205 is 50250540140302.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20304104505205 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 732193294 + ... + 732221023.

It is an arithmetic number, because the mean of its divisors is an integer number (1581567463440).

Almost surely, 2^{20304104505205} is an apocalyptic number.

It is an amenable number.

20304104505205 is a deficient number, since it is larger than the sum of its proper divisors (5000974909835).

20304104505205 is a wasteful number, since it uses less digits than its factorization.

20304104505205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464414428.

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 20304104505205 its reverse (50250540140302), we get a palindrome (70554644645507).

The spelling of 20304104505205 in words is "twenty trillion, three hundred four billion, one hundred four million, five hundred five thousand, two hundred five".