18408004 has 12 divisors (see below), whose sum is σ = 33614784. Its totient is φ = 8803784.

The previous prime is 18408001. The next prime is 18408023. The reversal of 18408004 is 40080481.

It is a super-2 number, since 2×18408004² = 677709222528032, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18408004.

It is not an unprimeable number, because it can be changed into a prime (18408001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99952 + ... + 100135.

It is an arithmetic number, because the mean of its divisors is an integer number (2801232).

Almost surely, 2^18408004 is an apocalyptic number.

It is an amenable number.

18408004 is a deficient number, since it is larger than the sum of its proper divisors (15206780).

18408004 is a wasteful number, since it uses less digits than its factorization.

18408004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200114 (or 200112 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 18408004 is about 4290.4549875275. The cubic root of 18408004 is about 264.0394989874.

Adding to 18408004 its reverse (40080481), we get a palindrome (58488485).

The spelling of 18408004 in words is "eighteen million, four hundred eight thousand, four".