18184120919 has 8 divisors (see below), whose sum is σ = 19416008832. Its totient is φ = 16989005880.

The previous prime is 18184120897. The next prime is 18184120921. The reversal of 18184120919 is 91902148181.

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

It is not a de Polignac number, because 18184120919 - 2⁸ = 18184120663 is a prime.

It is a super-2 number, since 2×18184120919² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18184120919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18184120979) 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, 9192197 + ... + 9194174.

It is an arithmetic number, because the mean of its divisors is an integer number (2427001104).

Almost surely, 2^18184120919 is an apocalyptic number.

18184120919 is a deficient number, since it is larger than the sum of its proper divisors (1231887913).

18184120919 is a wasteful number, since it uses less digits than its factorization.

18184120919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18386437.

The product of its (nonzero) digits is 41472, while the sum is 44.

The spelling of 18184120919 in words is "eighteen billion, one hundred eighty-four million, one hundred twenty thousand, nine hundred nineteen".