20315303630563 has 32 divisors (see below), whose sum is σ = 21228511518720. Its totient is φ = 19423898807040.

The previous prime is 20315303630509. The next prime is 20315303630581. The reversal of 20315303630563 is 36503630351302.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20315303630563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20315303030563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2009222878 + ... + 2009232988.

It is an arithmetic number, because the mean of its divisors is an integer number (663390984960).

Almost surely, 2^{20315303630563} is an apocalyptic number.

20315303630563 is a deficient number, since it is larger than the sum of its proper divisors (913207888157).

20315303630563 is a wasteful number, since it uses less digits than its factorization.

20315303630563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12139.

The product of its (nonzero) digits is 437400, while the sum is 40.

Adding to 20315303630563 its reverse (36503630351302), we get a palindrome (56818933981865).

The spelling of 20315303630563 in words is "twenty trillion, three hundred fifteen billion, three hundred three million, six hundred thirty thousand, five hundred sixty-three".