12018644 has 24 divisors (see below), whose sum is σ = 23738400. Its totient is φ = 5274080.

The previous prime is 12018641. The next prime is 12018653. The reversal of 12018644 is 44681021.

It is a congruent number.

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, 3434 + ... + 5985.

It is an arithmetic number, because the mean of its divisors is an integer number (989100).

Almost surely, 2^12018644 is an apocalyptic number.

It is an amenable number.

12018644 is a deficient number, since it is larger than the sum of its proper divisors (11719756).

12018644 is a wasteful number, since it uses less digits than its factorization.

12018644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9463 (or 9461 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 12018644 is about 3466.7916003129. The cubic root of 12018644 is about 229.0613541165.

Adding to 12018644 its reverse (44681021), we get a palindrome (56699665).

The spelling of 12018644 in words is "twelve million, eighteen thousand, six hundred forty-four".