18222459 has 8 divisors (see below), whose sum is σ = 24659520. Its totient is φ = 11966856.

The previous prime is 18222443. The next prime is 18222461. The reversal of 18222459 is 95422281.

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

It is not a de Polignac number, because 18222459 - 2⁴ = 18222443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18222059) 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 in 7 ways as a sum of consecutive naturals, for example, 45129 + ... + 45530.

It is an arithmetic number, because the mean of its divisors is an integer number (3082440).

Almost surely, 2^18222459 is an apocalyptic number.

18222459 is a deficient number, since it is larger than the sum of its proper divisors (6437061).

18222459 is an equidigital number, since it uses as much as digits as its factorization.

18222459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90729.

The product of its digits is 11520, while the sum is 33.

The square root of 18222459 is about 4268.7772253890. Note that the first 3 decimals coincide. The cubic root of 18222459 is about 263.1493655348.

It can be divided in two parts, 18222 and 459, that added together give a palindrome (18681).

The spelling of 18222459 in words is "eighteen million, two hundred twenty-two thousand, four hundred fifty-nine".