209864343382 has 16 divisors (see below), whose sum is σ = 315143485200. Its totient is φ = 104816557440.

The previous prime is 209864343379. The next prime is 209864343431. The reversal of 209864343382 is 283343468902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16275994 + ... + 16288882.

It is an arithmetic number, because the mean of its divisors is an integer number (19696467825).

Almost surely, 2^209864343382 is an apocalyptic number.

209864343382 is a deficient number, since it is larger than the sum of its proper divisors (105279141818).

209864343382 is a wasteful number, since it uses less digits than its factorization.

209864343382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21231.

The product of its (nonzero) digits is 5971968, while the sum is 52.

The spelling of 209864343382 in words is "two hundred nine billion, eight hundred sixty-four million, three hundred forty-three thousand, three hundred eighty-two".