31311020023 has 2 divisors, whose sum is σ = 31311020024. Its totient is φ = 31311020022.

The previous prime is 31311020017. The next prime is 31311020033. The reversal of 31311020023 is 32002011313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31311020023 - 2⁹ = 31311019511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31311019979 and 31311020006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31311020033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655510011 + 15655510012.

It is an arithmetic number, because the mean of its divisors is an integer number (15655510012).

Almost surely, 2^31311020023 is an apocalyptic number.

31311020023 is a deficient number, since it is larger than the sum of its proper divisors (1).

31311020023 is an equidigital number, since it uses as much as digits as its factorization.

31311020023 is an odious number, because the sum of its binary digits is odd.

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

Adding to 31311020023 its reverse (32002011313), we get a palindrome (63313031336).

The spelling of 31311020023 in words is "thirty-one billion, three hundred eleven million, twenty thousand, twenty-three".