18322222 has 8 divisors (see below), whose sum is σ = 27893736. Its totient is φ = 9024312.

The previous prime is 18322219. The next prime is 18322231. The reversal of 18322222 is 22222381.

It is a happy number.

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

18322222 is a modest number, since divided by 2222 gives 1832 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 18322193 and 18322202.

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 in 3 ways as a sum of consecutive naturals, for example, 68233 + ... + 68500.

It is an arithmetic number, because the mean of its divisors is an integer number (3486717).

Almost surely, 2^18322222 is an apocalyptic number.

18322222 is a deficient number, since it is larger than the sum of its proper divisors (9571514).

18322222 is a wasteful number, since it uses less digits than its factorization.

18322222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136802.

The product of its digits is 768, while the sum is 22.

The square root of 18322222 is about 4280.4464720400. The cubic root of 18322222 is about 263.6287155278.

It can be divided in two parts, 1832 and 2222, that multiplied together give a palindrome (4070704).

The spelling of 18322222 in words is "eighteen million, three hundred twenty-two thousand, two hundred twenty-two".