16819721682 has 16 divisors (see below), whose sum is σ = 33896234592. Its totient is φ = 5563775360.

The previous prime is 16819721663. The next prime is 16819721729. The reversal of 16819721682 is 28612791861.

16819721682 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 10698783 + ... + 10700354.

It is an arithmetic number, because the mean of its divisors is an integer number (2118514662).

Almost surely, 2^16819721682 is an apocalyptic number.

16819721682 is an abundant number, since it is smaller than the sum of its proper divisors (17076512910).

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

16819721682 is a wasteful number, since it uses less digits than its factorization.

16819721682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21399273.

The product of its digits is 580608, while the sum is 51.

The spelling of 16819721682 in words is "sixteen billion, eight hundred nineteen million, seven hundred twenty-one thousand, six hundred eighty-two".