18190222 has 8 divisors (see below), whose sum is σ = 27866016. Its totient is φ = 8901552.

The previous prime is 18190127. The next prime is 18190223. The reversal of 18190222 is 22209181.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18190223) 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, 96663 + ... + 96850.

It is an arithmetic number, because the mean of its divisors is an integer number (3483252).

Almost surely, 2^18190222 is an apocalyptic number.

18190222 is a deficient number, since it is larger than the sum of its proper divisors (9675794).

18190222 is a wasteful number, since it uses less digits than its factorization.

18190222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193562.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 18190222 is about 4264.9996483001. Note that the first 3 decimals coincide. The cubic root of 18190222 is about 262.9940964522.

The spelling of 18190222 in words is "eighteen million, one hundred ninety thousand, two hundred twenty-two".