20185676568 has 24 divisors (see below), whose sum is σ = 54669540900. Its totient is φ = 6728558832.

The previous prime is 20185676531. The next prime is 20185676569. The reversal of 20185676568 is 86567658102.

20185676568 is a `hidden beast` number, since 2 + 0 + 1 + 8 + 5 + 6 + 76 + 568 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20185676569) 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 5 ways as a sum of consecutive naturals, for example, 140178238 + ... + 140178381.

Almost surely, 2^20185676568 is an apocalyptic number.

It is an amenable number.

20185676568 is an abundant number, since it is smaller than the sum of its proper divisors (34483864332).

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

20185676568 is a wasteful number, since it uses less digits than its factorization.

20185676568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280356631 (or 280356624 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 54.

The spelling of 20185676568 in words is "twenty billion, one hundred eighty-five million, six hundred seventy-six thousand, five hundred sixty-eight".