20444030213 has 2 divisors, whose sum is σ = 20444030214. Its totient is φ = 20444030212.

The previous prime is 20444030197. The next prime is 20444030231. The reversal of 20444030213 is 31203044402.

Together with next prime (20444030231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10591085569 + 9852944644 = 102913^2 + 99262^2 .

It is a cyclic number.

It is not a de Polignac number, because 20444030213 - 2⁴ = 20444030197 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20444030413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10222015106 + 10222015107.

It is an arithmetic number, because the mean of its divisors is an integer number (10222015107).

Almost surely, 2^20444030213 is an apocalyptic number.

It is an amenable number.

20444030213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20444030213 is an equidigital number, since it uses as much as digits as its factorization.

20444030213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20444030213 its reverse (31203044402), we get a palindrome (51647074615).

The spelling of 20444030213 in words is "twenty billion, four hundred forty-four million, thirty thousand, two hundred thirteen".