199210009923 has 24 divisors (see below), whose sum is σ = 297712506000. Its totient is φ = 128208878784.

The previous prime is 199210009919. The next prime is 199210009967. The reversal of 199210009923 is 329900012991.

199210009923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 199210009923 - 2² = 199210009919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199210009993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1919736 + ... + 2020842.

It is an arithmetic number, because the mean of its divisors is an integer number (12404687750).

Almost surely, 2^199210009923 is an apocalyptic number.

199210009923 is a deficient number, since it is larger than the sum of its proper divisors (98502496077).

199210009923 is a wasteful number, since it uses less digits than its factorization.

199210009923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108691 (or 108688 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 45.

The spelling of 199210009923 in words is "one hundred ninety-nine billion, two hundred ten million, nine thousand, nine hundred twenty-three".