20321321233 has 8 divisors (see below), whose sum is σ = 20475640640. Its totient is φ = 20167464240.

The previous prime is 20321321173. The next prime is 20321321249. The reversal of 20321321233 is 33212312302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20321321233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20321301233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27123 + ... + 203416.

It is an arithmetic number, because the mean of its divisors is an integer number (2559455080).

Almost surely, 2^20321321233 is an apocalyptic number.

It is an amenable number.

20321321233 is a deficient number, since it is larger than the sum of its proper divisors (154319407).

20321321233 is a wasteful number, since it uses less digits than its factorization.

20321321233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231207.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 20321321233 its reverse (33212312302), we get a palindrome (53533633535).

The spelling of 20321321233 in words is "twenty billion, three hundred twenty-one million, three hundred twenty-one thousand, two hundred thirty-three".