20312042213 has 2 divisors, whose sum is σ = 20312042214. Its totient is φ = 20312042212.

The previous prime is 20312042197. The next prime is 20312042237. The reversal of 20312042213 is 31224021302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20299980484 + 12061729 = 142478^2 + 3473^2 .

It is a cyclic number.

It is not a de Polignac number, because 20312042213 - 2⁴ = 20312042197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20312041213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156021106 + 10156021107.

It is an arithmetic number, because the mean of its divisors is an integer number (10156021107).

Almost surely, 2^20312042213 is an apocalyptic number.

It is an amenable number.

20312042213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20312042213 is an equidigital number, since it uses as much as digits as its factorization.

20312042213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20312042213 its reverse (31224021302), we get a palindrome (51536063515).

The spelling of 20312042213 in words is "twenty billion, three hundred twelve million, forty-two thousand, two hundred thirteen".