18222202 has 4 divisors (see below), whose sum is σ = 27333306. Its totient is φ = 9111100.

The previous prime is 18222173. The next prime is 18222223. The reversal of 18222202 is 20222281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20222281 = 797 ⋅25373.

It can be written as a sum of positive squares in only one way, i.e., 17564481 + 657721 = 4191^2 + 811^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18222202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4555549 + ... + 4555552.

Almost surely, 2^18222202 is an apocalyptic number.

18222202 is a deficient number, since it is larger than the sum of its proper divisors (9111104).

18222202 is an equidigital number, since it uses as much as digits as its factorization.

18222202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9111103.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 18222202 is about 4268.7471229859. The cubic root of 18222202 is about 263.1481284221.

Adding to 18222202 its reverse (20222281), we get a palindrome (38444483).

The spelling of 18222202 in words is "eighteen million, two hundred twenty-two thousand, two hundred two".