12423919187 has 2 divisors, whose sum is σ = 12423919188. Its totient is φ = 12423919186.

The previous prime is 12423919181. The next prime is 12423919217. The reversal of 12423919187 is 78191932421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12423919187 - 2⁴ = 12423919171 is a prime.

It is not a weakly prime, because it can be changed into another prime (12423919181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6211959593 + 6211959594.

It is an arithmetic number, because the mean of its divisors is an integer number (6211959594).

Almost surely, 2^12423919187 is an apocalyptic number.

12423919187 is a deficient number, since it is larger than the sum of its proper divisors (1).

12423919187 is an equidigital number, since it uses as much as digits as its factorization.

12423919187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 47.

The spelling of 12423919187 in words is "twelve billion, four hundred twenty-three million, nine hundred nineteen thousand, one hundred eighty-seven".