209080717923 has 48 divisors (see below), whose sum is σ = 353831777280. Its totient is φ = 108594158400.

The previous prime is 209080717873. The next prime is 209080717957. The reversal of 209080717923 is 329717080902.

It is not a de Polignac number, because 209080717923 - 2⁸ = 209080717667 is a prime.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (209080767923) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16601913 + ... + 16614501.

It is an arithmetic number, because the mean of its divisors is an integer number (7371495360).

Almost surely, 2^209080717923 is an apocalyptic number.

209080717923 is a deficient number, since it is larger than the sum of its proper divisors (144751059357).

209080717923 is a wasteful number, since it uses less digits than its factorization.

209080717923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22888 (or 22881 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 48.

The spelling of 209080717923 in words is "two hundred nine billion, eighty million, seven hundred seventeen thousand, nine hundred twenty-three".