20443042321 has 8 divisors (see below), whose sum is σ = 22972783680. Its totient is φ = 18050043792.

The previous prime is 20443042247. The next prime is 20443042331. The reversal of 20443042321 is 12324034402.

It is a happy number.

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-20443042321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20443042331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34185391 + ... + 34185988.

It is an arithmetic number, because the mean of its divisors is an integer number (2871597960).

Almost surely, 2^20443042321 is an apocalyptic number.

It is an amenable number.

20443042321 is a deficient number, since it is larger than the sum of its proper divisors (2529741359).

20443042321 is a wasteful number, since it uses less digits than its factorization.

20443042321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68371415.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 20443042321 its reverse (12324034402), we get a palindrome (32767076723).

The spelling of 20443042321 in words is "twenty billion, four hundred forty-three million, forty-two thousand, three hundred twenty-one".