12505032503 has 4 divisors (see below), whose sum is σ = 12628844808. Its totient is φ = 12381220200.

The previous prime is 12505032467. The next prime is 12505032509. The reversal of 12505032503 is 30523050521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30523050521 = 101 ⋅302208421.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12505032503 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12505032509) 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, 61906001 + ... + 61906202.

It is an arithmetic number, because the mean of its divisors is an integer number (3157211202).

Almost surely, 2^12505032503 is an apocalyptic number.

12505032503 is a deficient number, since it is larger than the sum of its proper divisors (123812305).

12505032503 is a wasteful number, since it uses less digits than its factorization.

12505032503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123812304.

The product of its (nonzero) digits is 4500, while the sum is 26.

The spelling of 12505032503 in words is "twelve billion, five hundred five million, thirty-two thousand, five hundred three".