12784045218 has 24 divisors (see below), whose sum is σ = 29742473232. Its totient is φ = 3652584264.

The previous prime is 12784045217. The next prime is 12784045243. The reversal of 12784045218 is 81254048721.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12784045218.

It is not an unprimeable number, because it can be changed into a prime (12784045217) 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 11 ways as a sum of consecutive naturals, for example, 21741280 + ... + 21741867.

It is an arithmetic number, because the mean of its divisors is an integer number (1239269718).

Almost surely, 2^12784045218 is an apocalyptic number.

12784045218 is an abundant number, since it is smaller than the sum of its proper divisors (16958428014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12784045218 is a wasteful number, since it uses less digits than its factorization.

12784045218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43483166 (or 43483159 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 42.

The spelling of 12784045218 in words is "twelve billion, seven hundred eighty-four million, forty-five thousand, two hundred eighteen".