18414018 has 48 divisors (see below), whose sum is σ = 46388160. Its totient is φ = 5169888.

The previous prime is 18414001. The next prime is 18414023. The reversal of 18414018 is 81041481.

It is a junction number, because it is equal to n+sod(n) for n = 18413982 and 18414000.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6196 + ... + 8672.

It is an arithmetic number, because the mean of its divisors is an integer number (966420).

Almost surely, 2^18414018 is an apocalyptic number.

18414018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18414018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23194080).

18414018 is an abundant number, since it is smaller than the sum of its proper divisors (27974142).

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

18414018 is a wasteful number, since it uses less digits than its factorization.

18414018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2551 (or 2548 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 18414018 is about 4291.1557883629. The cubic root of 18414018 is about 264.0682502605.

Adding to 18414018 its reverse (81041481), we get a palindrome (99455499).

The spelling of 18414018 in words is "eighteen million, four hundred fourteen thousand, eighteen".