12503844523 has 4 divisors (see below), whose sum is σ = 12534416680. Its totient is φ = 12473272368.

The previous prime is 12503844517. The next prime is 12503844533. The reversal of 12503844523 is 32544830521.

12503844523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12503844523 - 2⁹ = 12503844011 is a prime.

It is a super-2 number, since 2×12503844523² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12503844503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15285465 + ... + 15286282.

It is an arithmetic number, because the mean of its divisors is an integer number (3133604170).

Almost surely, 2^12503844523 is an apocalyptic number.

12503844523 is a deficient number, since it is larger than the sum of its proper divisors (30572157).

12503844523 is an equidigital number, since it uses as much as digits as its factorization.

12503844523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30572156.

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 12503844523 in words is "twelve billion, five hundred three million, eight hundred forty-four thousand, five hundred twenty-three".