20303333213 has 2 divisors, whose sum is σ = 20303333214. Its totient is φ = 20303333212.

The previous prime is 20303333207. The next prime is 20303333221. The reversal of 20303333213 is 31233330302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17886922564 + 2416410649 = 133742^2 + 49157^2 .

It is a cyclic number.

It is not a de Polignac number, because 20303333213 - 2¹² = 20303329117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20303333203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10151666606 + 10151666607.

It is an arithmetic number, because the mean of its divisors is an integer number (10151666607).

Almost surely, 2^20303333213 is an apocalyptic number.

It is an amenable number.

20303333213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20303333213 is an equidigital number, since it uses as much as digits as its factorization.

20303333213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 23.

Adding to 20303333213 its reverse (31233330302), we get a palindrome (51536663515).

The spelling of 20303333213 in words is "twenty billion, three hundred three million, three hundred thirty-three thousand, two hundred thirteen".