19845655323 has 32 divisors (see below), whose sum is σ = 28876538880. Its totient is φ = 12050142720.

The previous prime is 19845655303. The next prime is 19845655339. The reversal of 19845655323 is 32355654891.

It is not a de Polignac number, because 19845655323 - 2¹² = 19845651227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19845655303) 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 in 31 ways as a sum of consecutive naturals, for example, 2848318 + ... + 2855276.

It is an arithmetic number, because the mean of its divisors is an integer number (902391840).

Almost surely, 2^19845655323 is an apocalyptic number.

19845655323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

19845655323 is a deficient number, since it is larger than the sum of its proper divisors (9030883557).

19845655323 is a wasteful number, since it uses less digits than its factorization.

19845655323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7939.

The product of its digits is 3888000, while the sum is 51.

The spelling of 19845655323 in words is "nineteen billion, eight hundred forty-five million, six hundred fifty-five thousand, three hundred twenty-three".