20420201213 has 2 divisors, whose sum is σ = 20420201214. Its totient is φ = 20420201212.

The previous prime is 20420201149. The next prime is 20420201231. The reversal of 20420201213 is 31210202402.

Together with next prime (20420201231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20136177604 + 284023609 = 141902^2 + 16853^2 .

It is a cyclic number.

It is not a de Polignac number, because 20420201213 - 2⁶ = 20420201149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20420201191 and 20420201200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20420201273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10210100606 + 10210100607.

It is an arithmetic number, because the mean of its divisors is an integer number (10210100607).

Almost surely, 2^20420201213 is an apocalyptic number.

It is an amenable number.

20420201213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20420201213 is an equidigital number, since it uses as much as digits as its factorization.

20420201213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20420201213 its reverse (31210202402), we get a palindrome (51630403615).

The spelling of 20420201213 in words is "twenty billion, four hundred twenty million, two hundred one thousand, two hundred thirteen".