18424004 has 6 divisors (see below), whose sum is σ = 32242014. Its totient is φ = 9212000.

The previous prime is 18423967. The next prime is 18424027. The reversal of 18424004 is 40042481.

It can be written as a sum of positive squares in only one way, i.e., 12673600 + 5750404 = 3560^2 + 2398^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2302997 + ... + 2303004.

It is an arithmetic number, because the mean of its divisors is an integer number (5373669).

Almost surely, 2^18424004 is an apocalyptic number.

It is an amenable number.

18424004 is a deficient number, since it is larger than the sum of its proper divisors (13818010).

18424004 is a wasteful number, since it uses less digits than its factorization.

18424004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4606005 (or 4606003 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 18424004 is about 4292.3191866402. The cubic root of 18424004 is about 264.1159767445.

Adding to 18424004 its reverse (40042481), we get a palindrome (58466485).

The spelling of 18424004 in words is "eighteen million, four hundred twenty-four thousand, four".