16851421206 has 12 divisors (see below), whose sum is σ = 36511412652. Its totient is φ = 5617140396.

The previous prime is 16851421187. The next prime is 16851421211. The reversal of 16851421206 is 60212415861.

It is a happy number.

16851421206 is a `hidden beast` number, since 16 + 8 + 514 + 2 + 120 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 468095016 + ... + 468095051.

It is an arithmetic number, because the mean of its divisors is an integer number (3042617721).

Almost surely, 2^16851421206 is an apocalyptic number.

16851421206 is an abundant number, since it is smaller than the sum of its proper divisors (19659991446).

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

16851421206 is a wasteful number, since it uses less digits than its factorization.

16851421206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936190075 (or 936190072 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 16851421206 in words is "sixteen billion, eight hundred fifty-one million, four hundred twenty-one thousand, two hundred six".