18001612 has 12 divisors (see below), whose sum is σ = 31730440. Its totient is φ = 8935776.

The previous prime is 18001601. The next prime is 18001631. The reversal of 18001612 is 21610081.

It is a self number, because there is not a number n which added to its sum of digits gives 18001612.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15633 + ... + 16744.

Almost surely, 2^18001612 is an apocalyptic number.

It is an amenable number.

18001612 is a deficient number, since it is larger than the sum of its proper divisors (13728828).

18001612 is a wasteful number, since it uses less digits than its factorization.

18001612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32520 (or 32518 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 18001612 is about 4242.8306588880. The cubic root of 18001612 is about 262.0819625857.

Adding to 18001612 its reverse (21610081), we get a palindrome (39611693).

The spelling of 18001612 in words is "eighteen million, one thousand, six hundred twelve".