12031836 has 12 divisors (see below), whose sum is σ = 28074312. Its totient is φ = 4010608.

The previous prime is 12031777. The next prime is 12031837. The reversal of 12031836 is 63813021.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501315 + ... + 501338.

It is an arithmetic number, because the mean of its divisors is an integer number (2339526).

Almost surely, 2^12031836 is an apocalyptic number.

It is an amenable number.

12031836 is an abundant number, since it is smaller than the sum of its proper divisors (16042476).

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

12031836 is a wasteful number, since it uses less digits than its factorization.

12031836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002660 (or 1002658 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 12031836 is about 3468.6937022458. The cubic root of 12031836 is about 229.1451315227.

Adding to 12031836 its reverse (63813021), we get a palindrome (75844857).

The spelling of 12031836 in words is "twelve million, thirty-one thousand, eight hundred thirty-six".