18454222 has 4 divisors (see below), whose sum is σ = 27681336. Its totient is φ = 9227110.

The previous prime is 18454213. The next prime is 18454253. The reversal of 18454222 is 22245481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22245481 = 1879 ⋅11839.

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 as a sum of consecutive naturals, namely, 4613554 + ... + 4613557.

It is an arithmetic number, because the mean of its divisors is an integer number (6920334).

Almost surely, 2^18454222 is an apocalyptic number.

18454222 is a deficient number, since it is larger than the sum of its proper divisors (9227114).

18454222 is an equidigital number, since it uses as much as digits as its factorization.

18454222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9227113.

The product of its digits is 5120, while the sum is 28.

The square root of 18454222 is about 4295.8377529884. The cubic root of 18454222 is about 264.2602938575.

The spelling of 18454222 in words is "eighteen million, four hundred fifty-four thousand, two hundred twenty-two".