20446025643792 has 120 divisors (see below), whose sum is σ = 65894025637440. Its totient is φ = 5797128280320.

The previous prime is 20446025643707. The next prime is 20446025643793. The reversal of 20446025643792 is 29734652064402.

20446025643792 is a `hidden beast` number, since 2 + 0 + 4 + 4 + 6 + 0 + 2 + 564 + 3 + 79 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (20446025643793) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 77286867 + ... + 77550962.

It is an arithmetic number, because the mean of its divisors is an integer number (549116880312).

Almost surely, 2^{20446025643792} is an apocalyptic number.

It is an amenable number.

20446025643792 is an abundant number, since it is smaller than the sum of its proper divisors (45447999993648).

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

20446025643792 is a wasteful number, since it uses less digits than its factorization.

20446025643792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154837981 (or 154837972 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 54.

The spelling of 20446025643792 in words is "twenty trillion, four hundred forty-six billion, twenty-five million, six hundred forty-three thousand, seven hundred ninety-two".