19980368385 has 16 divisors (see below), whose sum is σ = 32201940096. Its totient is φ = 10578412928.

The previous prime is 19980368371. The next prime is 19980368389. The reversal of 19980368385 is 58386308991.

It is a cyclic number.

It is not a de Polignac number, because 19980368385 - 2⁶ = 19980368321 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19980368389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4859349 + ... + 4863458.

It is an arithmetic number, because the mean of its divisors is an integer number (2012621256).

Almost surely, 2^19980368385 is an apocalyptic number.

19980368385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19980368385 is a deficient number, since it is larger than the sum of its proper divisors (12221571711).

19980368385 is a wasteful number, since it uses less digits than its factorization.

19980368385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9722952.

The product of its (nonzero) digits is 11197440, while the sum is 60.

The spelling of 19980368385 in words is "nineteen billion, nine hundred eighty million, three hundred sixty-eight thousand, three hundred eighty-five".