16850185221 has 8 divisors (see below), whose sum is σ = 22560138304. Its totient is φ = 11186844480.

The previous prime is 16850185109. The next prime is 16850185243. The reversal of 16850185221 is 12258105861.

16850185221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16850185221 - 2¹¹ = 16850183173 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16850185221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16850185291) by changing a digit.

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, 11652241 + ... + 11653686.

It is an arithmetic number, because the mean of its divisors is an integer number (2820017288).

Almost surely, 2^16850185221 is an apocalyptic number.

It is an amenable number.

16850185221 is a deficient number, since it is larger than the sum of its proper divisors (5709953083).

16850185221 is a wasteful number, since it uses less digits than its factorization.

16850185221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23306171.

The product of its (nonzero) digits is 38400, while the sum is 39.

The spelling of 16850185221 in words is "sixteen billion, eight hundred fifty million, one hundred eighty-five thousand, two hundred twenty-one".