20131311303023 has 2 divisors, whose sum is σ = 20131311303024. Its totient is φ = 20131311303022.

The previous prime is 20131311303011. The next prime is 20131311303041. The reversal of 20131311303023 is 32030311313102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20131311303023 - 2¹⁰ = 20131311301999 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20131311303023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20131311303073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10065655651511 + 10065655651512.

It is an arithmetic number, because the mean of its divisors is an integer number (10065655651512).

Almost surely, 2^{20131311303023} is an apocalyptic number.

20131311303023 is a deficient number, since it is larger than the sum of its proper divisors (1).

20131311303023 is an equidigital number, since it uses as much as digits as its factorization.

20131311303023 is an evil number, because the sum of its binary digits is even.

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

Adding to 20131311303023 its reverse (32030311313102), we get a palindrome (52161622616125).

The spelling of 20131311303023 in words is "twenty trillion, one hundred thirty-one billion, three hundred eleven million, three hundred three thousand, twenty-three".