18641222 has 8 divisors (see below), whose sum is σ = 27991200. Its totient is φ = 9310824.

The previous prime is 18641167. The next prime is 18641251. The reversal of 18641222 is 22214681.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 18641191 and 18641200.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 2222 + ... + 6497.

It is an arithmetic number, because the mean of its divisors is an integer number (3498900).

Almost surely, 2^18641222 is an apocalyptic number.

18641222 is a deficient number, since it is larger than the sum of its proper divisors (9349978).

18641222 is a wasteful number, since it uses less digits than its factorization.

18641222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9790.

The product of its digits is 1536, while the sum is 26.

The square root of 18641222 is about 4317.5481468074. The cubic root of 18641222 is about 265.1498950239.

The spelling of 18641222 in words is "eighteen million, six hundred forty-one thousand, two hundred twenty-two".