18170236850 has 12 divisors (see below), whose sum is σ = 33796640634. Its totient is φ = 7268094720.

The previous prime is 18170236849. The next prime is 18170236853. The reversal of 18170236850 is 5863207181.

It can be written as a sum of positive squares in 3 ways, for example, as 9456201049 + 8714035801 = 97243^2 + 93349^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18170236798 and 18170236807.

It is not an unprimeable number, because it can be changed into a prime (18170236853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 181702319 + ... + 181702418.

Almost surely, 2^18170236850 is an apocalyptic number.

18170236850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18170236850 is a deficient number, since it is larger than the sum of its proper divisors (15626403784).

18170236850 is a wasteful number, since it uses less digits than its factorization.

18170236850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363404749 (or 363404744 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 18170236850 in words is "eighteen billion, one hundred seventy million, two hundred thirty-six thousand, eight hundred fifty".