19845842108 has 6 divisors (see below), whose sum is σ = 34730223696. Its totient is φ = 9922921052.

The previous prime is 19845842101. The next prime is 19845842117. The reversal of 19845842108 is 80124854891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19845842101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2480730260 + ... + 2480730267.

It is an arithmetic number, because the mean of its divisors is an integer number (5788370616).

Almost surely, 2^19845842108 is an apocalyptic number.

It is an amenable number.

19845842108 is a deficient number, since it is larger than the sum of its proper divisors (14884381588).

19845842108 is a wasteful number, since it uses less digits than its factorization.

19845842108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4961460531 (or 4961460529 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 50.

The spelling of 19845842108 in words is "nineteen billion, eight hundred forty-five million, eight hundred forty-two thousand, one hundred eight".