20312103231313 has 8 divisors (see below), whose sum is σ = 20472376773632. Its totient is φ = 20151834934896.

The previous prime is 20312103231289. The next prime is 20312103231317. The reversal of 20312103231313 is 31313230121302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20312103231313 - 2³⁷ = 20174664277841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20312103231317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6653131 + ... + 9213487.

It is an arithmetic number, because the mean of its divisors is an integer number (2559047096704).

Almost surely, 2^{20312103231313} is an apocalyptic number.

It is an amenable number.

20312103231313 is a deficient number, since it is larger than the sum of its proper divisors (160273542319).

20312103231313 is a wasteful number, since it uses less digits than its factorization.

20312103231313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2622951.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 20312103231313 its reverse (31313230121302), we get a palindrome (51625333352615).

The spelling of 20312103231313 in words is "twenty trillion, three hundred twelve billion, one hundred three million, two hundred thirty-one thousand, three hundred thirteen".