18418104 has 80 divisors (see below), whose sum is σ = 52867320. Its totient is φ = 5987520.

The previous prime is 18418073. The next prime is 18418109. The reversal of 18418104 is 40181481.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18418109) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 27534 + ... + 28194.

Almost surely, 2^18418104 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 18418104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26433660).

18418104 is an abundant number, since it is smaller than the sum of its proper divisors (34449216).

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

18418104 is a wasteful number, since it uses less digits than its factorization.

18418104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722 (or 709 counting only the distinct ones).

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

The square root of 18418104 is about 4291.6318574640. The cubic root of 18418104 is about 264.0877807268.

Adding to 18418104 its reverse (40181481), we get a palindrome (58599585).

The spelling of 18418104 in words is "eighteen million, four hundred eighteen thousand, one hundred four".