18118612 has 6 divisors (see below), whose sum is σ = 31707578. Its totient is φ = 9059304.

The previous prime is 18118603. The next prime is 18118657. The reversal of 18118612 is 21681181.

18118612 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in only one way, i.e., 17189316 + 929296 = 4146^2 + 964^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2264823 + ... + 2264830.

Almost surely, 2^18118612 is an apocalyptic number.

It is an amenable number.

18118612 is a deficient number, since it is larger than the sum of its proper divisors (13588966).

18118612 is a wasteful number, since it uses less digits than its factorization.

18118612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4529657 (or 4529655 counting only the distinct ones).

The product of its digits is 768, while the sum is 28.

The square root of 18118612 is about 4256.5962928142. The cubic root of 18118612 is about 262.6485303026.

Adding to 18118612 its reverse (21681181), we get a palindrome (39799793).

The spelling of 18118612 in words is "eighteen million, one hundred eighteen thousand, six hundred twelve".