12018655 has 8 divisors (see below), whose sum is σ = 15733584. Its totient is φ = 8740800.

The previous prime is 12018653. The next prime is 12018679. The reversal of 12018655 is 55681021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12018655 - 2¹ = 12018653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12018653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109206 + ... + 109315.

It is an arithmetic number, because the mean of its divisors is an integer number (1966698).

Almost surely, 2^12018655 is an apocalyptic number.

12018655 is a deficient number, since it is larger than the sum of its proper divisors (3714929).

12018655 is a wasteful number, since it uses less digits than its factorization.

12018655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218537.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 12018655 is about 3466.7931867938. The cubic root of 12018655 is about 229.0614239989.

Adding to 12018655 its reverse (55681021), we get a palindrome (67699676).

The spelling of 12018655 in words is "twelve million, eighteen thousand, six hundred fifty-five".