12308899905 has 12 divisors (see below), whose sum is σ = 21335426580. Its totient is φ = 6564746592.

The previous prime is 12308899859. The next prime is 12308899951. The reversal of 12308899905 is 50999880321.

12308899905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12308899859) and next prime (12308899951).

It can be written as a sum of positive squares in 2 ways, for example, as 3374680464 + 8934219441 = 58092^2 + 94521^2 .

It is not a de Polignac number, because 12308899905 - 2¹⁷ = 12308768833 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136765510 + ... + 136765599.

It is an arithmetic number, because the mean of its divisors is an integer number (1777952215).

Almost surely, 2^12308899905 is an apocalyptic number.

12308899905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12308899905 is a deficient number, since it is larger than the sum of its proper divisors (9026526675).

12308899905 is a wasteful number, since it uses less digits than its factorization.

12308899905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273531120 (or 273531117 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The spelling of 12308899905 in words is "twelve billion, three hundred eight million, eight hundred ninety-nine thousand, nine hundred five".