20310302505 has 32 divisors (see below), whose sum is σ = 32613912576. Its totient is φ = 10793096384.

The previous prime is 20310302479. The next prime is 20310302527. The reversal of 20310302505 is 50520301302.

It is a cyclic number.

It is not a de Polignac number, because 20310302505 - 2⁵ = 20310302473 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 5604124 + ... + 5607746.

It is an arithmetic number, because the mean of its divisors is an integer number (1019184768).

Almost surely, 2^20310302505 is an apocalyptic number.

It is an amenable number.

20310302505 is a deficient number, since it is larger than the sum of its proper divisors (12303610071).

20310302505 is a wasteful number, since it uses less digits than its factorization.

20310302505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4877.

The product of its (nonzero) digits is 900, while the sum is 21.

Adding to 20310302505 its reverse (50520301302), we get a palindrome (70830603807).

The spelling of 20310302505 in words is "twenty billion, three hundred ten million, three hundred two thousand, five hundred five".