20052054221 has 2 divisors, whose sum is σ = 20052054222. Its totient is φ = 20052054220.

The previous prime is 20052054173. The next prime is 20052054247. The reversal of 20052054221 is 12245025002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17925460996 + 2126593225 = 133886^2 + 46115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20052054221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20052054271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10026027110 + 10026027111.

It is an arithmetic number, because the mean of its divisors is an integer number (10026027111).

Almost surely, 2^20052054221 is an apocalyptic number.

It is an amenable number.

20052054221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20052054221 is an equidigital number, since it uses as much as digits as its factorization.

20052054221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1600, while the sum is 23.

Adding to 20052054221 its reverse (12245025002), we get a palindrome (32297079223).

The spelling of 20052054221 in words is "twenty billion, fifty-two million, fifty-four thousand, two hundred twenty-one".