19943986196 has 24 divisors (see below), whose sum is σ = 36793606080. Its totient is φ = 9433089792.

The previous prime is 19943986187. The next prime is 19943986201. The reversal of 19943986196 is 69168934991.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143816 + ... + 246111.

It is an arithmetic number, because the mean of its divisors is an integer number (1533066920).

Almost surely, 2^19943986196 is an apocalyptic number.

It is an amenable number.

19943986196 is a deficient number, since it is larger than the sum of its proper divisors (16849619884).

19943986196 is a wasteful number, since it uses less digits than its factorization.

19943986196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390623 (or 390621 counting only the distinct ones).

The product of its digits is 22674816, while the sum is 65.

The spelling of 19943986196 in words is "nineteen billion, nine hundred forty-three million, nine hundred eighty-six thousand, one hundred ninety-six".