19944112115 has 4 divisors (see below), whose sum is σ = 23932934544. Its totient is φ = 15955289688.

The previous prime is 19944112103. The next prime is 19944112151. The reversal of 19944112115 is 51121144991.

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

It is a cyclic number.

It is not a de Polignac number, because 19944112115 - 2⁴ = 19944112099 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1994411207 + ... + 1994411216.

It is an arithmetic number, because the mean of its divisors is an integer number (5983233636).

Almost surely, 2^19944112115 is an apocalyptic number.

19944112115 is a deficient number, since it is larger than the sum of its proper divisors (3988822429).

19944112115 is an equidigital number, since it uses as much as digits as its factorization.

19944112115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3988822428.

The product of its digits is 12960, while the sum is 38.

The spelling of 19944112115 in words is "nineteen billion, nine hundred forty-four million, one hundred twelve thousand, one hundred fifteen".