20203144221 has 16 divisors (see below), whose sum is σ = 29056543040. Its totient is φ = 12412604160.

The previous prime is 20203144219. The next prime is 20203144229. The reversal of 20203144221 is 12244130202.

It is not a de Polignac number, because 20203144221 - 2¹ = 20203144219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20203144229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 394300 + ... + 442581.

It is an arithmetic number, because the mean of its divisors is an integer number (1816033940).

Almost surely, 2^20203144221 is an apocalyptic number.

It is an amenable number.

20203144221 is a deficient number, since it is larger than the sum of its proper divisors (8853398819).

20203144221 is a wasteful number, since it uses less digits than its factorization.

20203144221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837516.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20203144221 its reverse (12244130202), we get a palindrome (32447274423).

The spelling of 20203144221 in words is "twenty billion, two hundred three million, one hundred forty-four thousand, two hundred twenty-one".