19443493986 has 32 divisors (see below), whose sum is σ = 44446525440. Its totient is φ = 5554752336.

The previous prime is 19443493921. The next prime is 19443493987. The reversal of 19443493986 is 68939434491.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19443493987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 695205 + ... + 722631.

It is an arithmetic number, because the mean of its divisors is an integer number (1388953920).

Almost surely, 2^19443493986 is an apocalyptic number.

19443493986 is an abundant number, since it is smaller than the sum of its proper divisors (25003031454).

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

19443493986 is a wasteful number, since it uses less digits than its factorization.

19443493986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44318.

The product of its digits is 20155392, while the sum is 60.

It can be divided in two parts, 194434 and 93986, that added together give a triangular number (288420 = T₇₅₉).

The spelling of 19443493986 in words is "nineteen billion, four hundred forty-three million, four hundred ninety-three thousand, nine hundred eighty-six".