20303440221 has 8 divisors (see below), whose sum is σ = 28663680384. Its totient is φ = 12739413440.

The previous prime is 20303440177. The next prime is 20303440231. The reversal of 20303440221 is 12204430302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20303440221 - 2¹¹ = 20303438173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20303440231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199053285 + ... + 199053386.

It is an arithmetic number, because the mean of its divisors is an integer number (3582960048).

Almost surely, 2^20303440221 is an apocalyptic number.

It is an amenable number.

20303440221 is a deficient number, since it is larger than the sum of its proper divisors (8360240163).

20303440221 is a wasteful number, since it uses less digits than its factorization.

20303440221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398106691.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20303440221 its reverse (12204430302), we get a palindrome (32507870523).

The spelling of 20303440221 in words is "twenty billion, three hundred three million, four hundred forty thousand, two hundred twenty-one".