12530511503 has 4 divisors (see below), whose sum is σ = 12541213368. Its totient is φ = 12519809640.

The previous prime is 12530511493. The next prime is 12530511529. The reversal of 12530511503 is 30511503521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30511503521 = 2447 ⋅12468943.

It is a cyclic number.

It is not a de Polignac number, because 12530511503 - 2⁶ = 12530511439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12530511583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5349176 + ... + 5351517.

It is an arithmetic number, because the mean of its divisors is an integer number (3135303342).

Almost surely, 2^12530511503 is an apocalyptic number.

12530511503 is a deficient number, since it is larger than the sum of its proper divisors (10701865).

12530511503 is a wasteful number, since it uses less digits than its factorization.

12530511503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10701864.

The product of its (nonzero) digits is 2250, while the sum is 26.

The spelling of 12530511503 in words is "twelve billion, five hundred thirty million, five hundred eleven thousand, five hundred three".