12136518 has 24 divisors (see below), whose sum is σ = 27007968. Its totient is φ = 3935952.

The previous prime is 12136517. The next prime is 12136547. The reversal of 12136518 is 81563121.

12136518 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 651 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 12136491 and 12136500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12136513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8446 + ... + 9777.

It is an arithmetic number, because the mean of its divisors is an integer number (1125332).

Almost surely, 2^12136518 is an apocalyptic number.

12136518 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12136518 is an abundant number, since it is smaller than the sum of its proper divisors (14871450).

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

12136518 is a wasteful number, since it uses less digits than its factorization.

12136518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18268 (or 18265 counting only the distinct ones).

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

The square root of 12136518 is about 3483.7505651237. The cubic root of 12136518 is about 229.8077662822.

Adding to 12136518 its reverse (81563121), we get a palindrome (93699639).

The spelling of 12136518 in words is "twelve million, one hundred thirty-six thousand, five hundred eighteen".