18182394 has 20 divisors (see below), whose sum is σ = 40742394. Its totient is φ = 6060744.

The previous prime is 18182389. The next prime is 18182413. The reversal of 18182394 is 49328181.

It can be written as a sum of positive squares in only one way, i.e., 16916769 + 1265625 = 4113^2 + 1125^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 55957 + ... + 56280.

Almost surely, 2^18182394 is an apocalyptic number.

18182394 is an abundant number, since it is smaller than the sum of its proper divisors (22560000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18182394 is a wasteful number, since it uses less digits than its factorization.

18182394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112251 (or 112242 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 18182394 is about 4264.0818472445. The cubic root of 18182394 is about 262.9563653170.

The spelling of 18182394 in words is "eighteen million, one hundred eighty-two thousand, three hundred ninety-four".