12105947428 has 12 divisors (see below), whose sum is σ = 21192942960. Its totient is φ = 6050820872.

The previous prime is 12105947419. The next prime is 12105947431. The reversal of 12105947428 is 82474950121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 525526 + ... + 548077.

It is an arithmetic number, because the mean of its divisors is an integer number (1766078580).

Almost surely, 2^12105947428 is an apocalyptic number.

It is an amenable number.

12105947428 is a deficient number, since it is larger than the sum of its proper divisors (9086995532).

12105947428 is a wasteful number, since it uses less digits than its factorization.

12105947428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076426 (or 1076424 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 12105947428 in words is "twelve billion, one hundred five million, nine hundred forty-seven thousand, four hundred twenty-eight".