18299422 has 4 divisors (see below), whose sum is σ = 27449136. Its totient is φ = 9149710.

The previous prime is 18299419. The next prime is 18299431. The reversal of 18299422 is 22499281.

It is a semiprime because it is the product of two primes.

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, 4574854 + ... + 4574857.

It is an arithmetic number, because the mean of its divisors is an integer number (6862284).

Almost surely, 2^18299422 is an apocalyptic number.

18299422 is a deficient number, since it is larger than the sum of its proper divisors (9149714).

18299422 is an equidigital number, since it uses as much as digits as its factorization.

18299422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9149713.

The product of its digits is 20736, while the sum is 37.

The square root of 18299422 is about 4277.7823694059. The cubic root of 18299422 is about 263.5193177762.

It can be divided in two parts, 18299 and 422, that added together give a triangular number (18721 = T₁₉₃).

The spelling of 18299422 in words is "eighteen million, two hundred ninety-nine thousand, four hundred twenty-two".