18228094 has 4 divisors (see below), whose sum is σ = 27342144. Its totient is φ = 9114046.

The previous prime is 18228083. The next prime is 18228157. The reversal of 18228094 is 49082281.

It is a semiprime because it is the product of two primes.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 4557022 + ... + 4557025.

It is an arithmetic number, because the mean of its divisors is an integer number (6835536).

Almost surely, 2^18228094 is an apocalyptic number.

18228094 is a deficient number, since it is larger than the sum of its proper divisors (9114050).

18228094 is an equidigital number, since it uses as much as digits as its factorization.

18228094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9114049.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 18228094 is about 4269.4371994444. The cubic root of 18228094 is about 263.1764876309.

The spelling of 18228094 in words is "eighteen million, two hundred twenty-eight thousand, ninety-four".