20320313113031 has 16 divisors (see below), whose sum is σ = 20374142745600. Its totient is φ = 20266576783488.

The previous prime is 20320313113013. The next prime is 20320313113033. The reversal of 20320313113031 is 13031131302302.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20320313113031 is a prime.

It is a super-2 number, since 2×20320313113031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20320313112988 and 20320313113006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320313113033) 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, 2016099050 + ... + 2016109128.

It is an arithmetic number, because the mean of its divisors is an integer number (1273383921600).

Almost surely, 2^{20320313113031} is an apocalyptic number.

20320313113031 is a deficient number, since it is larger than the sum of its proper divisors (53829632569).

20320313113031 is a wasteful number, since it uses less digits than its factorization.

20320313113031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14198.

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

Adding to 20320313113031 its reverse (13031131302302), we get a palindrome (33351444415333).

The spelling of 20320313113031 in words is "twenty trillion, three hundred twenty billion, three hundred thirteen million, one hundred thirteen thousand, thirty-one".