209363830806 has 16 divisors (see below), whose sum is σ = 450937481904. Its totient is φ = 64419640224.

The previous prime is 209363830799. The next prime is 209363830811. The reversal of 209363830806 is 608038363902.

It is a congruent number.

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, 1342075761 + ... + 1342075916.

It is an arithmetic number, because the mean of its divisors is an integer number (28183592619).

Almost surely, 2^209363830806 is an apocalyptic number.

209363830806 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

209363830806 is an abundant number, since it is smaller than the sum of its proper divisors (241573651098).

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

209363830806 is a wasteful number, since it uses less digits than its factorization.

209363830806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2684151695.

The product of its (nonzero) digits is 1119744, while the sum is 48.

The spelling of 209363830806 in words is "two hundred nine billion, three hundred sixty-three million, eight hundred thirty thousand, eight hundred six".