12194109828 has 36 divisors (see below), whose sum is σ = 30829003660. Its totient is φ = 4064043456.

The previous prime is 12194109821. The next prime is 12194109899. The reversal of 12194109828 is 82890149121.

12194109828 is a `hidden beast` number, since 121 + 9 + 410 + 98 + 28 = 666.

12194109828 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2685519684 + 9508590144 = 51822^2 + 97512^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (12194109821) by changing a digit.

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, 230526 + ... + 278442.

Almost surely, 2^12194109828 is an apocalyptic number.

12194109828 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12194109828 is an abundant number, since it is smaller than the sum of its proper divisors (18634893832).

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

12194109828 is a wasteful number, since it uses less digits than its factorization.

12194109828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54996 (or 54991 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The spelling of 12194109828 in words is "twelve billion, one hundred ninety-four million, one hundred nine thousand, eight hundred twenty-eight".