18199226 has 8 divisors (see below), whose sum is σ = 28735680. Its totient is φ = 8620668.

The previous prime is 18199213. The next prime is 18199229. The reversal of 18199226 is 62299181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 478927 = 18199226 / (1 + 8 + 1 + 9 + 9 + 2 + 2 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 18199226.

It is not an unprimeable number, because it can be changed into a prime (18199229) 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 in 3 ways as a sum of consecutive naturals, for example, 239426 + ... + 239501.

It is an arithmetic number, because the mean of its divisors is an integer number (3591960).

Almost surely, 2^18199226 is an apocalyptic number.

18199226 is a deficient number, since it is larger than the sum of its proper divisors (10536454).

18199226 is a wasteful number, since it uses less digits than its factorization.

18199226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478948.

The product of its digits is 15552, while the sum is 38.

The square root of 18199226 is about 4266.0550863766. The cubic root of 18199226 is about 263.0374825497.

The spelling of 18199226 in words is "eighteen million, one hundred ninety-nine thousand, two hundred twenty-six".