18024002 has 4 divisors (see below), whose sum is σ = 27036006. Its totient is φ = 9012000.

The previous prime is 18023981. The next prime is 18024011. The reversal of 18024002 is 20042081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20042081 = 877 ⋅22853.

It can be written as a sum of positive squares in only one way, i.e., 15062161 + 2961841 = 3881^2 + 1721^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4505999 + ... + 4506002.

Almost surely, 2^18024002 is an apocalyptic number.

18024002 is a deficient number, since it is larger than the sum of its proper divisors (9012004).

18024002 is an equidigital number, since it uses as much as digits as its factorization.

18024002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9012003.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 18024002 is about 4245.4684076083. The cubic root of 18024002 is about 262.1905747846.

Adding to 18024002 its reverse (20042081), we get a palindrome (38066083).

The spelling of 18024002 in words is "eighteen million, twenty-four thousand, two".