19823981199 has 16 divisors (see below), whose sum is σ = 28837451520. Its totient is φ = 12013463360.

The previous prime is 19823981173. The next prime is 19823981207. The reversal of 19823981199 is 99118932891.

It is a cyclic number.

It is not a de Polignac number, because 19823981199 - 2⁵ = 19823981167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19823981159) 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, 509467 + ... + 546995.

It is an arithmetic number, because the mean of its divisors is an integer number (1802340720).

Almost surely, 2^19823981199 is an apocalyptic number.

19823981199 is a deficient number, since it is larger than the sum of its proper divisors (9013470321).

19823981199 is a wasteful number, since it uses less digits than its factorization.

19823981199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53550.

The product of its digits is 2519424, while the sum is 60.

The spelling of 19823981199 in words is "nineteen billion, eight hundred twenty-three million, nine hundred eighty-one thousand, one hundred ninety-nine".