20303230321 has 16 divisors (see below), whose sum is σ = 22837148928. Its totient is φ = 17890563600.

The previous prime is 20303230309. The next prime is 20303230327. The reversal of 20303230321 is 12303230302.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20303230321 - 2⁹ = 20303229809 is a prime.

It is a super-2 number, since 2×20303230321² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20303230327) 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, 101871 + ... + 225796.

It is an arithmetic number, because the mean of its divisors is an integer number (1427321808).

Almost surely, 2^20303230321 is an apocalyptic number.

It is an amenable number.

20303230321 is a deficient number, since it is larger than the sum of its proper divisors (2533918607).

20303230321 is a wasteful number, since it uses less digits than its factorization.

20303230321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327852.

The product of its (nonzero) digits is 648, while the sum is 19.

Subtracting from 20303230321 its sum of digits (19), we obtain a palindrome (20303230302).

Adding to 20303230321 its reverse (12303230302), we get a palindrome (32606460623).

The spelling of 20303230321 in words is "twenty billion, three hundred three million, two hundred thirty thousand, three hundred twenty-one".