20504358608 has 20 divisors (see below), whose sum is σ = 39732839748. Its totient is φ = 10250722560.

The previous prime is 20504358583. The next prime is 20504358643. The reversal of 20504358608 is 80685340502.

It can be written as a sum of positive squares in 2 ways, for example, as 332405824 + 20171952784 = 18232^2 + 142028^2 .

It is a congruent number.

It is an unprimeable number.

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, 29948 + ... + 204708.

Almost surely, 2^20504358608 is an apocalyptic number.

It is an amenable number.

20504358608 is a deficient number, since it is larger than the sum of its proper divisors (19228481140).

20504358608 is a wasteful number, since it uses less digits than its factorization.

20504358608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182102 (or 182096 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 20504358608 in words is "twenty billion, five hundred four million, three hundred fifty-eight thousand, six hundred eight".