20530542240211 has 4 divisors (see below), whose sum is σ = 20530573513632. Its totient is φ = 20530510966792.

The previous prime is 20530542240203. The next prime is 20530542240217. The reversal of 20530542240211 is 11204224503502.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20530542240211 - 2³ = 20530542240203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20530542240217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14630395 + ... + 15972148.

It is an arithmetic number, because the mean of its divisors is an integer number (5132643378408).

Almost surely, 2^{20530542240211} is an apocalyptic number.

20530542240211 is a deficient number, since it is larger than the sum of its proper divisors (31273421).

20530542240211 is an equidigital number, since it uses as much as digits as its factorization.

20530542240211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31273420.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 20530542240211 its reverse (11204224503502), we get a palindrome (31734766743713).

The spelling of 20530542240211 in words is "twenty trillion, five hundred thirty billion, five hundred forty-two million, two hundred forty thousand, two hundred eleven".