12018816 has 48 divisors (see below), whose sum is σ = 34588710. Its totient is φ = 4005888.

The previous prime is 12018749. The next prime is 12018817. The reversal of 12018816 is 61881021.

It can be written as a sum of positive squares in only one way, i.e., 9585216 + 2433600 = 3096^2 + 1560^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is a zygodrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 12018816.

It is not an unprimeable number, because it can be changed into a prime (12018817) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4065 + ... + 6368.

Almost surely, 2^12018816 is an apocalyptic number.

12018816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12018816 is an abundant number, since it is smaller than the sum of its proper divisors (22569894).

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

12018816 is a wasteful number, since it uses less digits than its factorization.

12018816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10453 (or 10438 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 12018816 is about 3466.8164070224. The cubic root of 12018816 is about 229.0624468179.

Adding to 12018816 its reverse (61881021), we get a palindrome (73899837).

The spelling of 12018816 in words is "twelve million, eighteen thousand, eight hundred sixteen".