20324123440565 has 16 divisors (see below), whose sum is σ = 28050619147392. Its totient is φ = 13847774001984.

The previous prime is 20324123440529. The next prime is 20324123440597. The reversal of 20324123440565 is 56504432142302.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20324123440565 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1849323299 + ... + 1849334288.

It is an arithmetic number, because the mean of its divisors is an integer number (1753163696712).

Almost surely, 2^{20324123440565} is an apocalyptic number.

It is an amenable number.

20324123440565 is a deficient number, since it is larger than the sum of its proper divisors (7726495706827).

20324123440565 is a wasteful number, since it uses less digits than its factorization.

20324123440565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3698657756.

The product of its (nonzero) digits is 691200, while the sum is 41.

Adding to 20324123440565 its reverse (56504432142302), we get a palindrome (76828555582867).

The spelling of 20324123440565 in words is "twenty trillion, three hundred twenty-four billion, one hundred twenty-three million, four hundred forty thousand, five hundred sixty-five".