18003104 has 48 divisors (see below), whose sum is σ = 40824000. Its totient is φ = 7655424.

The previous prime is 18003079. The next prime is 18003121. The reversal of 18003104 is 40130081.

It is a happy number.

It is a super-2 number, since 2×18003104² = 648223507269632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39872 + ... + 40320.

It is an arithmetic number, because the mean of its divisors is an integer number (850500).

Almost surely, 2^18003104 is an apocalyptic number.

18003104 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18003104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20412000).

18003104 is an abundant number, since it is smaller than the sum of its proper divisors (22820896).

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

18003104 is a wasteful number, since it uses less digits than its factorization.

18003104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645 (or 637 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 18003104 is about 4243.0064812583. The cubic root of 18003104 is about 262.0892029648.

Adding to 18003104 its reverse (40130081), we get a palindrome (58133185).

The spelling of 18003104 in words is "eighteen million, three thousand, one hundred four".