2009181819291 has 8 divisors (see below), whose sum is σ = 2679019021824. Its totient is φ = 1339399581480.

The previous prime is 2009181819259. The next prime is 2009181819341. The reversal of 2009181819291 is 1929181819002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2009181819291 - 2⁵ = 2009181819259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2009181819251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13655811 + ... + 13802156.

It is an arithmetic number, because the mean of its divisors is an integer number (334877377728).

Almost surely, 2^{2009181819291} is an apocalyptic number.

2009181819291 is a deficient number, since it is larger than the sum of its proper divisors (669837202533).

2009181819291 is a wasteful number, since it uses less digits than its factorization.

2009181819291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27482361.

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

The spelling of 2009181819291 in words is "two trillion, nine billion, one hundred eighty-one million, eight hundred nineteen thousand, two hundred ninety-one".