20313122013 has 24 divisors (see below), whose sum is σ = 29774541888. Its totient is φ = 13343300352.

The previous prime is 20313122003. The next prime is 20313122017. The reversal of 20313122013 is 31022131302.

It is not a de Polignac number, because 20313122013 - 2⁵ = 20313121981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313122017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 146920 + ... + 249422.

It is an arithmetic number, because the mean of its divisors is an integer number (1240605912).

Almost surely, 2^20313122013 is an apocalyptic number.

It is an amenable number.

20313122013 is a deficient number, since it is larger than the sum of its proper divisors (9461419875).

20313122013 is a wasteful number, since it uses less digits than its factorization.

20313122013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102833 (or 102830 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20313122013 its reverse (31022131302), we get a palindrome (51335253315).

The spelling of 20313122013 in words is "twenty billion, three hundred thirteen million, one hundred twenty-two thousand, thirteen".