12013403509 has 2 divisors, whose sum is σ = 12013403510. Its totient is φ = 12013403508.

The previous prime is 12013403491. The next prime is 12013403513. The reversal of 12013403509 is 90530431021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8109903025 + 3903500484 = 90055^2 + 62478^2 .

It is a cyclic number.

It is not a de Polignac number, because 12013403509 - 2⁹ = 12013402997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12013403009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006701754 + 6006701755.

It is an arithmetic number, because the mean of its divisors is an integer number (6006701755).

Almost surely, 2^12013403509 is an apocalyptic number.

It is an amenable number.

12013403509 is a deficient number, since it is larger than the sum of its proper divisors (1).

12013403509 is an equidigital number, since it uses as much as digits as its factorization.

12013403509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The spelling of 12013403509 in words is "twelve billion, thirteen million, four hundred three thousand, five hundred nine".