20303310321 has 24 divisors (see below), whose sum is σ = 34672322880. Its totient is φ = 11201825376.

The previous prime is 20303310319. The next prime is 20303310353. The reversal of 20303310321 is 12301330302.

20303310321 is a `hidden beast` number, since 2 + 0 + 30 + 3 + 310 + 321 = 666.

It is not a de Polignac number, because 20303310321 - 2¹ = 20303310319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20303310294 and 20303310303.

It is not an unprimeable number, because it can be changed into a prime (20303310371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5554635 + ... + 5558288.

It is an arithmetic number, because the mean of its divisors is an integer number (1444680120).

Almost surely, 2^20303310321 is an apocalyptic number.

20303310321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20303310321 is a deficient number, since it is larger than the sum of its proper divisors (14369012559).

20303310321 is a wasteful number, since it uses less digits than its factorization.

20303310321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11112965 (or 11112962 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 20303310321 its reverse (12301330302), we get a palindrome (32604640623).

The spelling of 20303310321 in words is "twenty billion, three hundred three million, three hundred ten thousand, three hundred twenty-one".