20683427328 has 160 divisors (see below), whose sum is σ = 63336794400. Its totient is φ = 6656606208.

The previous prime is 20683427311. The next prime is 20683427329. The reversal of 20683427328 is 82372438602.

20683427328 is a `hidden beast` number, since 206 + 83 + 42 + 7 + 328 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20683427329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 375100 + ... + 426692.

It is an arithmetic number, because the mean of its divisors is an integer number (395854965).

Almost surely, 2^20683427328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20683427328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31668397200).

20683427328 is an abundant number, since it is smaller than the sum of its proper divisors (42653367072).

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

20683427328 is an equidigital number, since it uses as much as digits as its factorization.

20683427328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51649 (or 51627 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 20683427328 in words is "twenty billion, six hundred eighty-three million, four hundred twenty-seven thousand, three hundred twenty-eight".