18363408 has 160 divisors (see below), whose sum is σ = 58662912. Its totient is φ = 4838400.

The previous prime is 18363403. The next prime is 18363469. The reversal of 18363408 is 80436381.

It is not an unprimeable number, because it can be changed into a prime (18363403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 427035 + ... + 427077.

Almost surely, 2^18363408 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 18363408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29331456).

18363408 is an abundant number, since it is smaller than the sum of its proper divisors (40299504).

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

18363408 is a wasteful number, since it uses less digits than its factorization.

18363408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 18363408 is about 4285.2547182169. The cubic root of 18363408 is about 263.8261021906.

Adding to 18363408 its reverse (80436381), we get a palindrome (98799789).

The spelling of 18363408 in words is "eighteen million, three hundred sixty-three thousand, four hundred eight".