20313320311103 has 16 divisors (see below), whose sum is σ = 21489527808000. Its totient is φ = 19147928673312.

The previous prime is 20313320311049. The next prime is 20313320311133. The reversal of 20313320311103 is 30111302331302.

It is a de Polignac number, because none of the positive numbers 2^k-20313320311103 is a prime.

It is a super-2 number, since 2×20313320311103² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313320311133) 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, 5328338 + ... + 8307696.

It is an arithmetic number, because the mean of its divisors is an integer number (1343095488000).

Almost surely, 2^{20313320311103} is an apocalyptic number.

20313320311103 is a deficient number, since it is larger than the sum of its proper divisors (1176207496897).

20313320311103 is a wasteful number, since it uses less digits than its factorization.

20313320311103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2981174.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 20313320311103 its reverse (30111302331302), we get a palindrome (50424622642405).

The spelling of 20313320311103 in words is "twenty trillion, three hundred thirteen billion, three hundred twenty million, three hundred eleven thousand, one hundred three".