2009191819182 has 16 divisors (see below), whose sum is σ = 4024481345280. Its totient is φ = 668714321912.

The previous prime is 2009191819181. The next prime is 2009191819231. The reversal of 2009191819182 is 2819181919002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2009191819181) by changing a digit.

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, 254066838 + ... + 254074745.

It is an arithmetic number, because the mean of its divisors is an integer number (251530084080).

Almost surely, 2^{2009191819182} is an apocalyptic number.

2009191819182 is an abundant number, since it is smaller than the sum of its proper divisors (2015289526098).

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

2009191819182 is a wasteful number, since it uses less digits than its factorization.

2009191819182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508142247.

The product of its (nonzero) digits is 186624, while the sum is 51.

The spelling of 2009191819182 in words is "two trillion, nine billion, one hundred ninety-one million, eight hundred nineteen thousand, one hundred eighty-two".