19205242115 has 4 divisors (see below), whose sum is σ = 23046290544. Its totient is φ = 15364193688.

The previous prime is 19205242087. The next prime is 19205242129. The reversal of 19205242115 is 51124250291.

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 19205242115 - 2²⁶ = 19138133251 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 1920524207 + ... + 1920524216.

It is an arithmetic number, because the mean of its divisors is an integer number (5761572636).

Almost surely, 2^19205242115 is an apocalyptic number.

19205242115 is a deficient number, since it is larger than the sum of its proper divisors (3841048429).

19205242115 is an equidigital number, since it uses as much as digits as its factorization.

19205242115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3841048428.

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 19205242115 in words is "nineteen billion, two hundred five million, two hundred forty-two thousand, one hundred fifteen".