18194191076 has 12 divisors (see below), whose sum is σ = 33515615280. Its totient is φ = 8618301000.

The previous prime is 18194191049. The next prime is 18194191087. The reversal of 18194191076 is 67019149181.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18194191076.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119698550 + ... + 119698701.

It is an arithmetic number, because the mean of its divisors is an integer number (2792967940).

Almost surely, 2^18194191076 is an apocalyptic number.

It is an amenable number.

18194191076 is a deficient number, since it is larger than the sum of its proper divisors (15321424204).

18194191076 is a wasteful number, since it uses less digits than its factorization.

18194191076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239397274 (or 239397272 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 47.

The spelling of 18194191076 in words is "eighteen billion, one hundred ninety-four million, one hundred ninety-one thousand, seventy-six".