12946381899 has 32 divisors (see below), whose sum is σ = 20018568960. Its totient is φ = 7359696000.

The previous prime is 12946381883. The next prime is 12946381919. The reversal of 12946381899 is 99818364921.

It is not a de Polignac number, because 12946381899 - 2⁴ = 12946381883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12946381849) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38892 + ... + 165545.

It is an arithmetic number, because the mean of its divisors is an integer number (625580280).

Almost surely, 2^12946381899 is an apocalyptic number.

12946381899 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12946381899 is a deficient number, since it is larger than the sum of its proper divisors (7072187061).

12946381899 is a wasteful number, since it uses less digits than its factorization.

12946381899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204571.

The product of its digits is 6718464, while the sum is 60.

The spelling of 12946381899 in words is "twelve billion, nine hundred forty-six million, three hundred eighty-one thousand, eight hundred ninety-nine".