18018412 has 6 divisors (see below), whose sum is σ = 31532228. Its totient is φ = 9009204.

The previous prime is 18018401. The next prime is 18018433. The reversal of 18018412 is 21481081.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2252298 + ... + 2252305.

Almost surely, 2^18018412 is an apocalyptic number.

It is an amenable number.

18018412 is a deficient number, since it is larger than the sum of its proper divisors (13513816).

18018412 is a wasteful number, since it uses less digits than its factorization.

18018412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4504607 (or 4504605 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 18018412 is about 4244.8100075268. The cubic root of 18018412 is about 262.1634665457.

Adding to 18018412 its reverse (21481081), we get a palindrome (39499493).

The spelling of 18018412 in words is "eighteen million, eighteen thousand, four hundred twelve".