20320004365 has 4 divisors (see below), whose sum is σ = 24384005244. Its totient is φ = 16256003488.

The previous prime is 20320004329. The next prime is 20320004389. The reversal of 20320004365 is 56340002302.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4295229444 + 16024774921 = 65538^2 + 126589^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20320004365 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2032000432 + ... + 2032000441.

It is an arithmetic number, because the mean of its divisors is an integer number (6096001311).

Almost surely, 2^20320004365 is an apocalyptic number.

It is an amenable number.

20320004365 is a deficient number, since it is larger than the sum of its proper divisors (4064000879).

20320004365 is an equidigital number, since it uses as much as digits as its factorization.

20320004365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4064000878.

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 20320004365 its reverse (56340002302), we get a palindrome (76660006667).

The spelling of 20320004365 in words is "twenty billion, three hundred twenty million, four thousand, three hundred sixty-five".