18382282 has 4 divisors (see below), whose sum is σ = 27573426. Its totient is φ = 9191140.

The previous prime is 18382261. The next prime is 18382283. The reversal of 18382282 is 28228381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28228381 = 17 ⋅1660493.

It can be written as a sum of positive squares in only one way, i.e., 14661241 + 3721041 = 3829^2 + 1929^2 .

It is not an unprimeable number, because it can be changed into a prime (18382283) by changing a digit.

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 as a sum of consecutive naturals, namely, 4595569 + ... + 4595572.

Almost surely, 2^18382282 is an apocalyptic number.

18382282 is a deficient number, since it is larger than the sum of its proper divisors (9191144).

18382282 is an equidigital number, since it uses as much as digits as its factorization.

18382282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9191143.

The product of its digits is 12288, while the sum is 34.

The square root of 18382282 is about 4287.4563554630. The cubic root of 18382282 is about 263.9164584915.

The spelling of 18382282 in words is "eighteen million, three hundred eighty-two thousand, two hundred eighty-two".