12003813 has 12 divisors (see below), whose sum is σ = 17559360. Its totient is φ = 7900776.

The previous prime is 12003743. The next prime is 12003821. The reversal of 12003813 is 31830021.

12003813 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12003813 - 2⁸ = 12003557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12003833) 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, 7731 + ... + 9152.

It is an arithmetic number, because the mean of its divisors is an integer number (1463280).

Almost surely, 2^12003813 is an apocalyptic number.

It is an amenable number.

12003813 is a deficient number, since it is larger than the sum of its proper divisors (5555547).

12003813 is a wasteful number, since it uses less digits than its factorization.

12003813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16968 (or 16965 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 12003813 is about 3464.6519305696. The cubic root of 12003813 is about 228.9670948061.

Adding to 12003813 its reverse (31830021), we get a palindrome (43833834).

The spelling of 12003813 in words is "twelve million, three thousand, eight hundred thirteen".