20123322321 has 16 divisors (see below), whose sum is σ = 27268908800. Its totient is φ = 13197869568.

The previous prime is 20123322287. The next prime is 20123322337. The reversal of 20123322321 is 12322332102.

It is a happy number.

It is not a de Polignac number, because 20123322321 - 2³⁰ = 19049580497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20123322341) 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 15 ways as a sum of consecutive naturals, for example, 87616 + ... + 218913.

It is an arithmetic number, because the mean of its divisors is an integer number (1704306800).

Almost surely, 2^20123322321 is an apocalyptic number.

It is an amenable number.

20123322321 is a deficient number, since it is larger than the sum of its proper divisors (7145586479).

20123322321 is a wasteful number, since it uses less digits than its factorization.

20123322321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306888.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20123322321 its reverse (12322332102), we get a palindrome (32445654423).

The spelling of 20123322321 in words is "twenty billion, one hundred twenty-three million, three hundred twenty-two thousand, three hundred twenty-one".