12318732 has 18 divisors (see below), whose sum is σ = 31139108. Its totient is φ = 4106232.

The previous prime is 12318703. The next prime is 12318763. The reversal of 12318732 is 23781321.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 12318696 and 12318705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 171058 + ... + 171129.

Almost surely, 2^12318732 is an apocalyptic number.

12318732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12318732 is an abundant number, since it is smaller than the sum of its proper divisors (18820376).

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

12318732 is a wasteful number, since it uses less digits than its factorization.

12318732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342197 (or 342192 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 12318732 is about 3509.8051227953. The cubic root of 12318732 is about 230.9521461563.

The spelling of 12318732 in words is "twelve million, three hundred eighteen thousand, seven hundred thirty-two".