20384536808 has 16 divisors (see below), whose sum is σ = 38615038980. Its totient is φ = 10087193088.

The previous prime is 20384536801. The next prime is 20384536813. The reversal of 20384536808 is 80863548302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19327116484 + 1057420324 = 139022^2 + 32518^2 .

It is not an unprimeable number, because it can be changed into a prime (20384536801) by changing a digit.

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, 13133591 + ... + 13135142.

Almost surely, 2^20384536808 is an apocalyptic number.

It is an amenable number.

20384536808 is a deficient number, since it is larger than the sum of its proper divisors (18230502172).

20384536808 is a wasteful number, since it uses less digits than its factorization.

20384536808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26268836 (or 26268832 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 47.

The spelling of 20384536808 in words is "twenty billion, three hundred eighty-four million, five hundred thirty-six thousand, eight hundred eight".