20533450213 has 2 divisors, whose sum is σ = 20533450214. Its totient is φ = 20533450212.

The previous prime is 20533450211. The next prime is 20533450339. The reversal of 20533450213 is 31205433502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16134842529 + 4398607684 = 127023^2 + 66322^2 .

It is a cyclic number.

It is not a de Polignac number, because 20533450213 - 2¹ = 20533450211 is a prime.

Together with 20533450211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20533450211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10266725106 + 10266725107.

It is an arithmetic number, because the mean of its divisors is an integer number (10266725107).

Almost surely, 2^20533450213 is an apocalyptic number.

It is an amenable number.

20533450213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20533450213 is an equidigital number, since it uses as much as digits as its factorization.

20533450213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 28.

Adding to 20533450213 its reverse (31205433502), we get a palindrome (51738883715).

The spelling of 20533450213 in words is "twenty billion, five hundred thirty-three million, four hundred fifty thousand, two hundred thirteen".