12516318 has 24 divisors (see below), whose sum is σ = 28714608. Its totient is φ = 3926592.

The previous prime is 12516299. The next prime is 12516341. The reversal of 12516318 is 81361521.

12516318 is a `hidden beast` number, since 1 + 25 + 1 + 631 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 12516291 and 12516300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20146 + ... + 20757.

It is an arithmetic number, because the mean of its divisors is an integer number (1196442).

Almost surely, 2^12516318 is an apocalyptic number.

12516318 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12516318 is an abundant number, since it is smaller than the sum of its proper divisors (16198290).

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

12516318 is a wasteful number, since it uses less digits than its factorization.

12516318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40928 (or 40925 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 12516318 is about 3537.8408669696. The cubic root of 12516318 is about 232.1803863631.

Adding to 12516318 its reverse (81361521), we get a palindrome (93877839).

It can be divided in two parts, 1251 and 6318, that added together give a square (7569 = 87²).

The spelling of 12516318 in words is "twelve million, five hundred sixteen thousand, three hundred eighteen".