20521530005227 has 2 divisors, whose sum is σ = 20521530005228. Its totient is φ = 20521530005226.

The previous prime is 20521530005189. The next prime is 20521530005233. The reversal of 20521530005227 is 72250003512502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20521530005227 - 2¹⁹ = 20521529480939 is a prime.

It is a super-2 number, since 2×20521530005227² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20521530005192 and 20521530005201.

It is not a weakly prime, because it can be changed into another prime (20521530005257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10260765002613 + 10260765002614.

It is an arithmetic number, because the mean of its divisors is an integer number (10260765002614).

Almost surely, 2^{20521530005227} is an apocalyptic number.

20521530005227 is a deficient number, since it is larger than the sum of its proper divisors (1).

20521530005227 is an equidigital number, since it uses as much as digits as its factorization.

20521530005227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42000, while the sum is 34.

Adding to 20521530005227 its reverse (72250003512502), we get a palindrome (92771533517729).

The spelling of 20521530005227 in words is "twenty trillion, five hundred twenty-one billion, five hundred thirty million, five thousand, two hundred twenty-seven".