20385355984 has 20 divisors (see below), whose sum is σ = 45139002784. Its totient is φ = 8736581088.

The previous prime is 20385355951. The next prime is 20385355993. The reversal of 20385355984 is 48955358302.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 91005942 + ... + 91006165.

Almost surely, 2^20385355984 is an apocalyptic number.

It is an amenable number.

20385355984 is an abundant number, since it is smaller than the sum of its proper divisors (24753646800).

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

20385355984 is a wasteful number, since it uses less digits than its factorization.

20385355984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182012122 (or 182012116 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 52.

The spelling of 20385355984 in words is "twenty billion, three hundred eighty-five million, three hundred fifty-five thousand, nine hundred eighty-four".