20355300345 has 16 divisors (see below), whose sum is σ = 32570520192. Its totient is φ = 10855480320.

The previous prime is 20355300289. The next prime is 20355300347. The reversal of 20355300345 is 54300355302.

It is not a de Polignac number, because 20355300345 - 2⁸ = 20355300089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20355300347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287860 + ... + 351530.

It is an arithmetic number, because the mean of its divisors is an integer number (2035657512).

Almost surely, 2^20355300345 is an apocalyptic number.

It is an amenable number.

20355300345 is a deficient number, since it is larger than the sum of its proper divisors (12215219847).

20355300345 is a wasteful number, since it uses less digits than its factorization.

20355300345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84992.

The product of its (nonzero) digits is 27000, while the sum is 30.

Adding to 20355300345 its reverse (54300355302), we get a palindrome (74655655647).

The spelling of 20355300345 in words is "twenty billion, three hundred fifty-five million, three hundred thousand, three hundred forty-five".