18422008 has 24 divisors (see below), whose sum is σ = 37968840. Its totient is φ = 8373200.

The previous prime is 18422003. The next prime is 18422009. The reversal of 18422008 is 80022481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18422003) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 8548 + ... + 10483.

It is an arithmetic number, because the mean of its divisors is an integer number (1582035).

Almost surely, 2^18422008 is an apocalyptic number.

It is an amenable number.

18422008 is an abundant number, since it is smaller than the sum of its proper divisors (19546832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18422008 is a wasteful number, since it uses less digits than its factorization.

18422008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19059 (or 19044 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 18422008 is about 4292.0866720047. The cubic root of 18422008 is about 264.1064385622.

Adding to 18422008 its reverse (80022481), we get a palindrome (98444489).

The spelling of 18422008 in words is "eighteen million, four hundred twenty-two thousand, eight".