20204354505 has 16 divisors (see below), whose sum is σ = 32336311104. Its totient is φ = 10772541120.

The previous prime is 20204354441. The next prime is 20204354507. The reversal of 20204354505 is 50545340202.

It is not a de Polignac number, because 20204354505 - 2⁶ = 20204354441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20204354507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140554 + ... + 245283.

It is an arithmetic number, because the mean of its divisors is an integer number (2021019444).

Almost surely, 2^20204354505 is an apocalyptic number.

It is an amenable number.

20204354505 is a deficient number, since it is larger than the sum of its proper divisors (12131956599).

20204354505 is a wasteful number, since it uses less digits than its factorization.

20204354505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389336.

The product of its (nonzero) digits is 24000, while the sum is 30.

Adding to 20204354505 its reverse (50545340202), we get a palindrome (70749694707).

The spelling of 20204354505 in words is "twenty billion, two hundred four million, three hundred fifty-four thousand, five hundred five".