18168316850 has 12 divisors (see below), whose sum is σ = 33793069434. Its totient is φ = 7267326720.

The previous prime is 18168316849. The next prime is 18168316889. The reversal of 18168316850 is 5861386181.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 12414639241 + 5753677609 = 111421^2 + 75853^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18168316795 and 18168316804.

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 5 ways as a sum of consecutive naturals, for example, 181683119 + ... + 181683218.

Almost surely, 2^18168316850 is an apocalyptic number.

18168316850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18168316850 is a deficient number, since it is larger than the sum of its proper divisors (15624752584).

18168316850 is a wasteful number, since it uses less digits than its factorization.

18168316850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363366349 (or 363366344 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 47.

The spelling of 18168316850 in words is "eighteen billion, one hundred sixty-eight million, three hundred sixteen thousand, eight hundred fifty".