18163612 has 6 divisors (see below), whose sum is σ = 31786328. Its totient is φ = 9081804.

The previous prime is 18163609. The next prime is 18163627. The reversal of 18163612 is 21636181.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2270448 + ... + 2270455.

Almost surely, 2^18163612 is an apocalyptic number.

It is an amenable number.

18163612 is a deficient number, since it is larger than the sum of its proper divisors (13622716).

18163612 is a wasteful number, since it uses less digits than its factorization.

18163612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4540907 (or 4540905 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 18163612 is about 4261.8789283601. The cubic root of 18163612 is about 262.8657914721.

Adding to 18163612 its reverse (21636181), we get a palindrome (39799793).

The spelling of 18163612 in words is "eighteen million, one hundred sixty-three thousand, six hundred twelve".