20320270816 has 48 divisors (see below), whose sum is σ = 42795599616. Its totient is φ = 9463873536.

The previous prime is 20320270813. The next prime is 20320270829. The reversal of 20320270816 is 61807202302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320270813) 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, 139776 + ... + 245311.

It is an arithmetic number, because the mean of its divisors is an integer number (891574992).

Almost surely, 2^20320270816 is an apocalyptic number.

It is an amenable number.

20320270816 is an abundant number, since it is smaller than the sum of its proper divisors (22475328800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20320270816 is a wasteful number, since it uses less digits than its factorization.

20320270816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385211 (or 385203 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The spelling of 20320270816 in words is "twenty billion, three hundred twenty million, two hundred seventy thousand, eight hundred sixteen".