31130020423 has 2 divisors, whose sum is σ = 31130020424. Its totient is φ = 31130020422.

The previous prime is 31130020393. The next prime is 31130020429. The reversal of 31130020423 is 32402003113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31130020423 - 2⁹ = 31130019911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31130020423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31130020429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15565010211 + 15565010212.

It is an arithmetic number, because the mean of its divisors is an integer number (15565010212).

Almost surely, 2^31130020423 is an apocalyptic number.

31130020423 is a deficient number, since it is larger than the sum of its proper divisors (1).

31130020423 is an equidigital number, since it uses as much as digits as its factorization.

31130020423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 31130020423 its reverse (32402003113), we get a palindrome (63532023536).

The spelling of 31130020423 in words is "thirty-one billion, one hundred thirty million, twenty thousand, four hundred twenty-three".