20288012816 has 20 divisors (see below), whose sum is σ = 39974264400. Its totient is φ = 9972073632.

The previous prime is 20288012807. The next prime is 20288012819. The reversal of 20288012816 is 61821088202.

It is a self number, because there is not a number n which added to its sum of digits gives 20288012816.

It is not an unprimeable number, because it can be changed into a prime (20288012819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10744826 + ... + 10746713.

It is an arithmetic number, because the mean of its divisors is an integer number (1998713220).

Almost surely, 2^20288012816 is an apocalyptic number.

It is an amenable number.

20288012816 is a deficient number, since it is larger than the sum of its proper divisors (19686251584).

20288012816 is a wasteful number, since it uses less digits than its factorization.

20288012816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21491606 (or 21491600 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 38.

The spelling of 20288012816 in words is "twenty billion, two hundred eighty-eight million, twelve thousand, eight hundred sixteen".