12005547946 has 16 divisors (see below), whose sum is σ = 20585401344. Its totient is φ = 5144119344.

The previous prime is 12005547943. The next prime is 12005547959. The reversal of 12005547946 is 64974550021.

It is not an unprimeable number, because it can be changed into a prime (12005547943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24330 + ... + 156853.

It is an arithmetic number, because the mean of its divisors is an integer number (1286587584).

Almost surely, 2^12005547946 is an apocalyptic number.

12005547946 is a deficient number, since it is larger than the sum of its proper divisors (8579853398).

12005547946 is a wasteful number, since it uses less digits than its factorization.

12005547946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185925.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 12005547946 in words is "twelve billion, five million, five hundred forty-seven thousand, nine hundred forty-six".