18689612 has 12 divisors (see below), whose sum is σ = 32759496. Its totient is φ = 9329760.

The previous prime is 18689611. The next prime is 18689617. The reversal of 18689612 is 21698681.

It is a self number, because there is not a number n which added to its sum of digits gives 18689612.

It is not an unprimeable number, because it can be changed into a prime (18689611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689 + ... + 6152.

It is an arithmetic number, because the mean of its divisors is an integer number (2729958).

Almost surely, 2^18689612 is an apocalyptic number.

It is an amenable number.

18689612 is a deficient number, since it is larger than the sum of its proper divisors (14069884).

18689612 is a wasteful number, since it uses less digits than its factorization.

18689612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7528 (or 7526 counting only the distinct ones).

The product of its digits is 41472, while the sum is 41.

The square root of 18689612 is about 4323.1483897734. The cubic root of 18689612 is about 265.3791274432.

It can be divided in two parts, 186 and 89612, that added together give a palindrome (89798).

The spelling of 18689612 in words is "eighteen million, six hundred eighty-nine thousand, six hundred twelve".