18189082 has 12 divisors (see below), whose sum is σ = 28983870. Its totient is φ = 8559296.

The previous prime is 18189077. The next prime is 18189097. The reversal of 18189082 is 28098181.

It can be written as a sum of positive squares in 3 ways, for example, as 17969121 + 219961 = 4239^2 + 469^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15157 + ... + 16312.

Almost surely, 2^18189082 is an apocalyptic number.

18189082 is a deficient number, since it is larger than the sum of its proper divisors (10794788).

18189082 is a wasteful number, since it uses less digits than its factorization.

18189082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31505 (or 31488 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 37.

The square root of 18189082 is about 4264.8660002396. The cubic root of 18189082 is about 262.9886023002.

Subtracting 18189082 from its reverse (28098181), we obtain a palindrome (9909099).

The spelling of 18189082 in words is "eighteen million, one hundred eighty-nine thousand, eighty-two".