18119380394 has 16 divisors (see below), whose sum is σ = 27353604096. Its totient is φ = 9001602000.

The previous prime is 18119380339. The next prime is 18119380397. The reversal of 18119380394 is 49308391181.

It is not an unprimeable number, because it can be changed into a prime (18119380397) 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, 394919 + ... + 438405.

It is an arithmetic number, because the mean of its divisors is an integer number (1709600256).

Almost surely, 2^18119380394 is an apocalyptic number.

18119380394 is a deficient number, since it is larger than the sum of its proper divisors (9234223702).

18119380394 is a wasteful number, since it uses less digits than its factorization.

18119380394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44821.

The product of its (nonzero) digits is 186624, while the sum is 47.

The spelling of 18119380394 in words is "eighteen billion, one hundred nineteen million, three hundred eighty thousand, three hundred ninety-four".