20445986016 has 72 divisors (see below), whose sum is σ = 60018888384. Its totient is φ = 6595476480.

The previous prime is 20445985997. The next prime is 20445986081. The reversal of 20445986016 is 61068954402.

20445986016 is a `hidden beast` number, since 2 + 0 + 44 + 598 + 6 + 0 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

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 11 ways as a sum of consecutive naturals, for example, 1136121 + ... + 1153976.

It is an arithmetic number, because the mean of its divisors is an integer number (833595672).

Almost surely, 2^20445986016 is an apocalyptic number.

It is an amenable number.

20445986016 is an abundant number, since it is smaller than the sum of its proper divisors (39572902368).

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

20445986016 is a wasteful number, since it uses less digits than its factorization.

20445986016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2290144 (or 2290133 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 20445986016 in words is "twenty billion, four hundred forty-five million, nine hundred eighty-six thousand, sixteen".