12381787442 has 16 divisors (see below), whose sum is σ = 19278801792. Its totient is φ = 5959839120.

The previous prime is 12381787357. The next prime is 12381787459. The reversal of 12381787442 is 24478718321.

It is a Harshad number since it is a multiple of its sum of digits (47).

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 7 ways as a sum of consecutive naturals, for example, 1073948 + ... + 1085415.

It is an arithmetic number, because the mean of its divisors is an integer number (1204925112).

Almost surely, 2^12381787442 is an apocalyptic number.

12381787442 is a deficient number, since it is larger than the sum of its proper divisors (6897014350).

12381787442 is a wasteful number, since it uses less digits than its factorization.

12381787442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2159473.

The product of its digits is 602112, while the sum is 47.

The spelling of 12381787442 in words is "twelve billion, three hundred eighty-one million, seven hundred eighty-seven thousand, four hundred forty-two".