12003005438 has 16 divisors (see below), whose sum is σ = 18187628976. Its totient is φ = 5940494400.

The previous prime is 12003005437. The next prime is 12003005449. The reversal of 12003005438 is 83450030021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12003005437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1215770 + ... + 1225602.

It is an arithmetic number, because the mean of its divisors is an integer number (1136726811).

Almost surely, 2^12003005438 is an apocalyptic number.

12003005438 is a deficient number, since it is larger than the sum of its proper divisors (6184623538).

12003005438 is a wasteful number, since it uses less digits than its factorization.

12003005438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15979.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 12003005438 its reverse (83450030021), we get a palindrome (95453035459).

The spelling of 12003005438 in words is "twelve billion, three million, five thousand, four hundred thirty-eight".