16920322056 has 96 divisors (see below), whose sum is σ = 50243544000. Its totient is φ = 5101557120.

The previous prime is 16920322043. The next prime is 16920322121. The reversal of 16920322056 is 65022302961.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 16920322056.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103930 + ... + 211286.

It is an arithmetic number, because the mean of its divisors is an integer number (523370250).

Almost surely, 2^16920322056 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 16920322056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25121772000).

16920322056 is an abundant number, since it is smaller than the sum of its proper divisors (33323221944).

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

16920322056 is a wasteful number, since it uses less digits than its factorization.

16920322056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107579 (or 107572 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 16920322056 in words is "sixteen billion, nine hundred twenty million, three hundred twenty-two thousand, fifty-six".