20424302321 has 4 divisors (see below), whose sum is σ = 20424690672. Its totient is φ = 20423913972.

The previous prime is 20424302309. The next prime is 20424302341. The reversal of 20424302321 is 12320342402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20424302321 - 2⁶ = 20424302257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20424302341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100091 + ... + 225536.

It is an arithmetic number, because the mean of its divisors is an integer number (5106172668).

Almost surely, 2^20424302321 is an apocalyptic number.

It is an amenable number.

20424302321 is a deficient number, since it is larger than the sum of its proper divisors (388351).

20424302321 is an equidigital number, since it uses as much as digits as its factorization.

20424302321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388350.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20424302321 its reverse (12320342402), we get a palindrome (32744644723).

The spelling of 20424302321 in words is "twenty billion, four hundred twenty-four million, three hundred two thousand, three hundred twenty-one".