19992447195 has 32 divisors (see below), whose sum is σ = 36564231168. Its totient is φ = 9137751168.

The previous prime is 19992447161. The next prime is 19992447203. The reversal of 19992447195 is 59174429991.

It is not a de Polignac number, because 19992447195 - 2¹³ = 19992439003 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 712522 + ... + 740048.

It is an arithmetic number, because the mean of its divisors is an integer number (1142632224).

Almost surely, 2^19992447195 is an apocalyptic number.

19992447195 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19992447195 is a deficient number, since it is larger than the sum of its proper divisors (16571783973).

19992447195 is a wasteful number, since it uses less digits than its factorization.

19992447195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34459.

The product of its digits is 7348320, while the sum is 60.

The spelling of 19992447195 in words is "nineteen billion, nine hundred ninety-two million, four hundred forty-seven thousand, one hundred ninety-five".