20320564223 has 8 divisors (see below), whose sum is σ = 20930845056. Its totient is φ = 19716543000.

The previous prime is 20320564217. The next prime is 20320564247. The reversal of 20320564223 is 32246502302.

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-20320564223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320564273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1558313 + ... + 1571298.

It is an arithmetic number, because the mean of its divisors is an integer number (2616355632).

Almost surely, 2^20320564223 is an apocalyptic number.

20320564223 is a deficient number, since it is larger than the sum of its proper divisors (610280833).

20320564223 is a wasteful number, since it uses less digits than its factorization.

20320564223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3129805.

The product of its (nonzero) digits is 17280, while the sum is 29.

The spelling of 20320564223 in words is "twenty billion, three hundred twenty million, five hundred sixty-four thousand, two hundred twenty-three".