18011308 has 36 divisors (see below), whose sum is σ = 36875440. Its totient is φ = 7540416.

The previous prime is 18011303. The next prime is 18011309. The reversal of 18011308 is 80311081.

It is not an unprimeable number, because it can be changed into a prime (18011303) 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 11 ways as a sum of consecutive naturals, for example, 78538 + ... + 78766.

Almost surely, 2^18011308 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18011308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18437720).

18011308 is an abundant number, since it is smaller than the sum of its proper divisors (18864132).

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

18011308 is a wasteful number, since it uses less digits than its factorization.

18011308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 18011308 is about 4243.9731384635. The cubic root of 18011308 is about 262.1290081986.

Adding to 18011308 its reverse (80311081), we get a palindrome (98322389).

The spelling of 18011308 in words is "eighteen million, eleven thousand, three hundred eight".