20342411321 has 4 divisors (see below), whose sum is σ = 20344209792. Its totient is φ = 20340612852.

The previous prime is 20342411279. The next prime is 20342411329. The reversal of 20342411321 is 12311424302.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12311424302 = 2 ⋅6155712151.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20342411321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20342411329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 882161 + ... + 904926.

It is an arithmetic number, because the mean of its divisors is an integer number (5086052448).

Almost surely, 2^20342411321 is an apocalyptic number.

It is an amenable number.

20342411321 is a deficient number, since it is larger than the sum of its proper divisors (1798471).

20342411321 is a wasteful number, since it uses less digits than its factorization.

20342411321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798470.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 20342411321 its reverse (12311424302), we get a palindrome (32653835623).

The spelling of 20342411321 in words is "twenty billion, three hundred forty-two million, four hundred eleven thousand, three hundred twenty-one".