20303423321 has 6 divisors (see below), whose sum is σ = 20653385322. Its totient is φ = 19959294080.

The previous prime is 20303423317. The next prime is 20303423353. The reversal of 20303423321 is 12332430302.

It can be written as a sum of positive squares in only one way, i.e., 18736134400 + 1567288921 = 136880^2 + 39589^2 .

It is not a de Polignac number, because 20303423321 - 2² = 20303423317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20303423381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2912840 + ... + 2919801.

It is an arithmetic number, because the mean of its divisors is an integer number (3442230887).

Almost surely, 2^20303423321 is an apocalyptic number.

It is an amenable number.

20303423321 is a deficient number, since it is larger than the sum of its proper divisors (349962001).

20303423321 is an frugal number, since it uses more digits than its factorization.

20303423321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5832759 (or 5832700 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 20303423321 its reverse (12332430302), we get a palindrome (32635853623).

The spelling of 20303423321 in words is "twenty billion, three hundred three million, four hundred twenty-three thousand, three hundred twenty-one".