19803443239406 has 16 divisors (see below), whose sum is σ = 29883374148240. Its totient is φ = 9842363926080.

The previous prime is 19803443239381. The next prime is 19803443239427. The reversal of 19803443239406 is 60493234430891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10476935 + ... + 12221826.

It is an arithmetic number, because the mean of its divisors is an integer number (1867710884265).

Almost surely, 2^{19803443239406} is an apocalyptic number.

19803443239406 is a deficient number, since it is larger than the sum of its proper divisors (10079930908834).

19803443239406 is a wasteful number, since it uses less digits than its factorization.

19803443239406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22701379.

The product of its (nonzero) digits is 13436928, while the sum is 56.

The spelling of 19803443239406 in words is "nineteen trillion, eight hundred three billion, four hundred forty-three million, two hundred thirty-nine thousand, four hundred six".