19873002199 has 4 divisors (see below), whose sum is σ = 19877363920. Its totient is φ = 19868640480.

The previous prime is 19873002187. The next prime is 19873002203. The reversal of 19873002199 is 99120037891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19873002199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19873002119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2174019 + ... + 2183140.

It is an arithmetic number, because the mean of its divisors is an integer number (4969340980).

Almost surely, 2^19873002199 is an apocalyptic number.

19873002199 is a deficient number, since it is larger than the sum of its proper divisors (4361721).

19873002199 is an equidigital number, since it uses as much as digits as its factorization.

19873002199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4361720.

The product of its (nonzero) digits is 244944, while the sum is 49.

The spelling of 19873002199 in words is "nineteen billion, eight hundred seventy-three million, two thousand, one hundred ninety-nine".