20645832065382 has 96 divisors (see below), whose sum is σ = 47363191424640. Its totient is φ = 6738837042240.

The previous prime is 20645832065381. The next prime is 20645832065389. The reversal of 20645832065382 is 28356023854602.

20645832065382 is a `hidden beast` number, since 2 + 0 + 6 + 4 + 5 + 83 + 20 + 6 + 538 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20645832065381) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2838157 + ... + 7024727.

It is an arithmetic number, because the mean of its divisors is an integer number (493366577340).

Almost surely, 2^{20645832065382} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20645832065382, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23681595712320).

20645832065382 is an abundant number, since it is smaller than the sum of its proper divisors (26717359359258).

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

20645832065382 is a wasteful number, since it uses less digits than its factorization.

20645832065382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4186800 (or 4186788 counting only the distinct ones).

The product of its (nonzero) digits is 16588800, while the sum is 54.

The spelling of 20645832065382 in words is "twenty trillion, six hundred forty-five billion, eight hundred thirty-two million, sixty-five thousand, three hundred eighty-two".