209000021168 has 20 divisors (see below), whose sum is σ = 404952899808. Its totient is φ = 104496047040.

The previous prime is 209000021141. The next prime is 209000021171. The reversal of 209000021168 is 861120000902.

209000021168 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 209000021168.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213305 + ... + 680807.

Almost surely, 2^209000021168 is an apocalyptic number.

It is an amenable number.

209000021168 is a deficient number, since it is larger than the sum of its proper divisors (195952878640).

209000021168 is a wasteful number, since it uses less digits than its factorization.

209000021168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495452 (or 495446 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 209000021168 in words is "two hundred nine billion, twenty-one thousand, one hundred sixty-eight".