20200424221 has 2 divisors, whose sum is σ = 20200424222. Its totient is φ = 20200424220.

The previous prime is 20200424219. The next prime is 20200424239. The reversal of 20200424221 is 12242400202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14306791321 + 5893632900 = 119611^2 + 76770^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200424221 - 2¹ = 20200424219 is a prime.

Together with 20200424219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20200424261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100212110 + 10100212111.

It is an arithmetic number, because the mean of its divisors is an integer number (10100212111).

Almost surely, 2^20200424221 is an apocalyptic number.

It is an amenable number.

20200424221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200424221 is an equidigital number, since it uses as much as digits as its factorization.

20200424221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 20200424221 its reverse (12242400202), we get a palindrome (32442824423).

The spelling of 20200424221 in words is "twenty billion, two hundred million, four hundred twenty-four thousand, two hundred twenty-one".