20320564533 has 8 divisors (see below), whose sum is σ = 27094927200. Its totient is φ = 13546622448.

The previous prime is 20320564531. The next prime is 20320564541. The reversal of 20320564533 is 33546502302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20320564533 - 2¹ = 20320564531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20320564494 and 20320564503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320564531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33838 + ... + 204416.

It is an arithmetic number, because the mean of its divisors is an integer number (3386865900).

Almost surely, 2^20320564533 is an apocalyptic number.

It is an amenable number.

20320564533 is a deficient number, since it is larger than the sum of its proper divisors (6774362667).

20320564533 is a wasteful number, since it uses less digits than its factorization.

20320564533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210291.

The product of its (nonzero) digits is 64800, while the sum is 33.

The spelling of 20320564533 in words is "twenty billion, three hundred twenty million, five hundred sixty-four thousand, five hundred thirty-three".