20013131023 has 2 divisors, whose sum is σ = 20013131024. Its totient is φ = 20013131022.

The previous prime is 20013131011. The next prime is 20013131077. The reversal of 20013131023 is 32013131002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20013131023 - 2³³ = 11423196431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20013130988 and 20013131006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20013131123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006565511 + 10006565512.

It is an arithmetic number, because the mean of its divisors is an integer number (10006565512).

Almost surely, 2^20013131023 is an apocalyptic number.

20013131023 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013131023 is an equidigital number, since it uses as much as digits as its factorization.

20013131023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 20013131023 its reverse (32013131002), we get a palindrome (52026262025).

The spelling of 20013131023 in words is "twenty billion, thirteen million, one hundred thirty-one thousand, twenty-three".