20013100235305 has 4 divisors (see below), whose sum is σ = 24015720282372. Its totient is φ = 16010480188240.

The previous prime is 20013100235299. The next prime is 20013100235333. The reversal of 20013100235305 is 50353200131002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3586720850496 + 16426379384809 = 1893864^2 + 4052947^2 .

It is not a de Polignac number, because 20013100235305 - 2¹¹ = 20013100233257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20013100235305.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2001310023526 + ... + 2001310023535.

It is an arithmetic number, because the mean of its divisors is an integer number (6003930070593).

Almost surely, 2^{20013100235305} is an apocalyptic number.

It is an amenable number.

20013100235305 is a deficient number, since it is larger than the sum of its proper divisors (4002620047067).

20013100235305 is an equidigital number, since it uses as much as digits as its factorization.

20013100235305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4002620047066.

The product of its (nonzero) digits is 2700, while the sum is 25.

Adding to 20013100235305 its reverse (50353200131002), we get a palindrome (70366300366307).

The spelling of 20013100235305 in words is "twenty trillion, thirteen billion, one hundred million, two hundred thirty-five thousand, three hundred five".