20536354213 has 2 divisors, whose sum is σ = 20536354214. Its totient is φ = 20536354212.

The previous prime is 20536354177. The next prime is 20536354243. The reversal of 20536354213 is 31245363502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18075995809 + 2460358404 = 134447^2 + 49602^2 .

It is a cyclic number.

It is not a de Polignac number, because 20536354213 - 2⁹ = 20536353701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20536354243) 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, 10268177106 + 10268177107.

It is an arithmetic number, because the mean of its divisors is an integer number (10268177107).

Almost surely, 2^20536354213 is an apocalyptic number.

It is an amenable number.

20536354213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20536354213 is an equidigital number, since it uses as much as digits as its factorization.

20536354213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 34.

The spelling of 20536354213 in words is "twenty billion, five hundred thirty-six million, three hundred fifty-four thousand, two hundred thirteen".