20033320221 has 16 divisors (see below), whose sum is σ = 30045403520. Its totient is φ = 13355545356.

The previous prime is 20033320211. The next prime is 20033320231. The reversal of 20033320221 is 12202333002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20033320211) and next prime (20033320231).

It is not a de Polignac number, because 20033320221 - 2⁶ = 20033320157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20033320194 and 20033320203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20033320201) 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, 4577905 + ... + 4582278.

It is an arithmetic number, because the mean of its divisors is an integer number (1877837720).

Almost surely, 2^20033320221 is an apocalyptic number.

It is an amenable number.

20033320221 is a deficient number, since it is larger than the sum of its proper divisors (10012083299).

20033320221 is an frugal number, since it uses more digits than its factorization.

20033320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9160204 (or 9160186 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 20033320221 its reverse (12202333002), we get a palindrome (32235653223).

The spelling of 20033320221 in words is "twenty billion, thirty-three million, three hundred twenty thousand, two hundred twenty-one".