19938896205 has 32 divisors (see below), whose sum is σ = 33013094400. Its totient is φ = 10264031232.

The previous prime is 19938896183. The next prime is 19938896209. The reversal of 19938896205 is 50269883991.

It is a happy number.

It is not a de Polignac number, because 19938896205 - 2⁹ = 19938895693 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19938896209) by changing a digit.

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, 1860372 + ... + 1871058.

It is an arithmetic number, because the mean of its divisors is an integer number (1031659200).

Almost surely, 2^19938896205 is an apocalyptic number.

19938896205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19938896205 is a deficient number, since it is larger than the sum of its proper divisors (13074198195).

19938896205 is a wasteful number, since it uses less digits than its factorization.

19938896205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15013.

The product of its (nonzero) digits is 8398080, while the sum is 60.

The spelling of 19938896205 in words is "nineteen billion, nine hundred thirty-eight million, eight hundred ninety-six thousand, two hundred five".