12018642 has 16 divisors (see below), whose sum is σ = 24186720. Its totient is φ = 3981312.

The previous prime is 12018641. The next prime is 12018653. The reversal of 12018642 is 24681021.

It is not an unprimeable number, because it can be changed into a prime (12018641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5167 + ... + 7122.

It is an arithmetic number, because the mean of its divisors is an integer number (1511670).

Almost surely, 2^12018642 is an apocalyptic number.

12018642 is an abundant number, since it is smaller than the sum of its proper divisors (12168078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12018642 is a wasteful number, since it uses less digits than its factorization.

12018642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12457.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 12018642 is about 3466.7913118617. The cubic root of 12018642 is about 229.0613414106.

Adding to 12018642 its reverse (24681021), we get a palindrome (36699663).

The spelling of 12018642 in words is "twelve million, eighteen thousand, six hundred forty-two".