18466222 has 4 divisors (see below), whose sum is σ = 27699336. Its totient is φ = 9233110.

The previous prime is 18466213. The next prime is 18466229. The reversal of 18466222 is 22266481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22266481 = 17 ⋅1309793.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18466229) 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 as a sum of consecutive naturals, namely, 4616554 + ... + 4616557.

It is an arithmetic number, because the mean of its divisors is an integer number (6924834).

Almost surely, 2^18466222 is an apocalyptic number.

18466222 is a deficient number, since it is larger than the sum of its proper divisors (9233114).

18466222 is an equidigital number, since it uses as much as digits as its factorization.

18466222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9233113.

The product of its digits is 9216, while the sum is 31.

The square root of 18466222 is about 4297.2342268022. The cubic root of 18466222 is about 264.3175605438.

The spelling of 18466222 in words is "eighteen million, four hundred sixty-six thousand, two hundred twenty-two".