18227308 has 24 divisors (see below), whose sum is σ = 36630720. Its totient is φ = 7848720.

The previous prime is 18227291. The next prime is 18227309. The reversal of 18227308 is 80372281.

It is a self number, because there is not a number n which added to its sum of digits gives 18227308.

It is not an unprimeable number, because it can be changed into a prime (18227309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10066 + ... + 11737.

It is an arithmetic number, because the mean of its divisors is an integer number (1526280).

Almost surely, 2^18227308 is an apocalyptic number.

It is an amenable number.

18227308 is an abundant number, since it is smaller than the sum of its proper divisors (18403412).

18227308 is a wasteful number, since it uses less digits than its factorization.

18227308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21837 (or 21835 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 18227308 is about 4269.3451488489. The cubic root of 18227308 is about 263.1727048311.

Adding to 18227308 its reverse (80372281), we get a palindrome (98599589).

The spelling of 18227308 in words is "eighteen million, two hundred twenty-seven thousand, three hundred eight".