19906992175436 has 12 divisors (see below), whose sum is σ = 36351898755312. Its totient is φ = 9520735388208.

The previous prime is 19906992175417. The next prime is 19906992175439. The reversal of 19906992175436 is 63457129960991.

It is a self number, because there is not a number n which added to its sum of digits gives 19906992175436.

It is not an unprimeable number, because it can be changed into a prime (19906992175439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108190174775 + ... + 108190174958.

It is an arithmetic number, because the mean of its divisors is an integer number (3029324896276).

Almost surely, 2^{19906992175436} is an apocalyptic number.

It is an amenable number.

19906992175436 is a deficient number, since it is larger than the sum of its proper divisors (16444906579876).

19906992175436 is a wasteful number, since it uses less digits than its factorization.

19906992175436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216380349760 (or 216380349758 counting only the distinct ones).

The product of its (nonzero) digits is 198404640, while the sum is 71.

The spelling of 19906992175436 in words is "nineteen trillion, nine hundred six billion, nine hundred ninety-two million, one hundred seventy-five thousand, four hundred thirty-six".