12243739019 has 2 divisors, whose sum is σ = 12243739020. Its totient is φ = 12243739018.

The previous prime is 12243739009. The next prime is 12243739037. The reversal of 12243739019 is 91093734221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12243739019 - 2⁴ = 12243739003 is a prime.

It is a super-2 number, since 2×12243739019² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (12243739009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6121869509 + 6121869510.

It is an arithmetic number, because the mean of its divisors is an integer number (6121869510).

Almost surely, 2^12243739019 is an apocalyptic number.

12243739019 is a deficient number, since it is larger than the sum of its proper divisors (1).

12243739019 is an equidigital number, since it uses as much as digits as its factorization.

12243739019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 41.

The spelling of 12243739019 in words is "twelve billion, two hundred forty-three million, seven hundred thirty-nine thousand, nineteen".