20530542240203 has 2 divisors, whose sum is σ = 20530542240204. Its totient is φ = 20530542240202.

The previous prime is 20530542240179. The next prime is 20530542240217. The reversal of 20530542240203 is 30204224503502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20530542240203 - 2³⁸ = 20255664333259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20530542240203.

It is not a weakly prime, because it can be changed into another prime (20530542240283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10265271120101 + 10265271120102.

It is an arithmetic number, because the mean of its divisors is an integer number (10265271120102).

Almost surely, 2^{20530542240203} is an apocalyptic number.

20530542240203 is a deficient number, since it is larger than the sum of its proper divisors (1).

20530542240203 is an equidigital number, since it uses as much as digits as its factorization.

20530542240203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 32.

Adding to 20530542240203 its reverse (30204224503502), we get a palindrome (50734766743705).

The spelling of 20530542240203 in words is "twenty trillion, five hundred thirty billion, five hundred forty-two million, two hundred forty thousand, two hundred three".