19505442386 has 32 divisors (see below), whose sum is σ = 30017952000. Its totient is φ = 9503125632.

The previous prime is 19505442367. The next prime is 19505442443. The reversal of 19505442386 is 68324450591.

It is a self number, because there is not a number n which added to its sum of digits gives 19505442386.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10390880 + ... + 10392756.

It is an arithmetic number, because the mean of its divisors is an integer number (938061000).

Almost surely, 2^19505442386 is an apocalyptic number.

19505442386 is a deficient number, since it is larger than the sum of its proper divisors (10512509614).

19505442386 is a wasteful number, since it uses less digits than its factorization.

19505442386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2786.

The product of its (nonzero) digits is 1036800, while the sum is 47.

The spelling of 19505442386 in words is "nineteen billion, five hundred five million, four hundred forty-two thousand, three hundred eighty-six".