12400305503 has 2 divisors, whose sum is σ = 12400305504. Its totient is φ = 12400305502.

The previous prime is 12400305487. The next prime is 12400305569. The reversal of 12400305503 is 30550300421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12400305503 - 2⁴ = 12400305487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12400305403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6200152751 + 6200152752.

It is an arithmetic number, because the mean of its divisors is an integer number (6200152752).

Almost surely, 2^12400305503 is an apocalyptic number.

12400305503 is a deficient number, since it is larger than the sum of its proper divisors (1).

12400305503 is an equidigital number, since it uses as much as digits as its factorization.

12400305503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 23.

Adding to 12400305503 its reverse (30550300421), we get a palindrome (42950605924).

The spelling of 12400305503 in words is "twelve billion, four hundred million, three hundred five thousand, five hundred three".