20020320221 has 16 divisors (see below), whose sum is σ = 21897727488. Its totient is φ = 18152554800.

The previous prime is 20020320209. The next prime is 20020320239. The reversal of 20020320221 is 12202302002.

It is a cyclic number.

It is not a de Polignac number, because 20020320221 - 2³⁰ = 18946578397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20020320196 and 20020320205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020320241) 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, 9875810 + ... + 9877836.

It is an arithmetic number, because the mean of its divisors is an integer number (1368607968).

Almost surely, 2^20020320221 is an apocalyptic number.

It is an amenable number.

20020320221 is a deficient number, since it is larger than the sum of its proper divisors (1877407267).

20020320221 is a wasteful number, since it uses less digits than its factorization.

20020320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3952.

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 20020320221 its reverse (12202302002), we get a palindrome (32222622223).

The spelling of 20020320221 in words is "twenty billion, twenty million, three hundred twenty thousand, two hundred twenty-one".