19885800055 has 24 divisors (see below), whose sum is σ = 26283783456. Its totient is φ = 14432489280.

The previous prime is 19885800043. The next prime is 19885800223. The reversal of 19885800055 is 55000858891.

It is not a de Polignac number, because 19885800055 - 2¹¹ = 19885798007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19885799981 and 19885800008.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 260889 + ... + 328381.

It is an arithmetic number, because the mean of its divisors is an integer number (1095157644).

Almost surely, 2^19885800055 is an apocalyptic number.

19885800055 is a deficient number, since it is larger than the sum of its proper divisors (6397983401).

19885800055 is a wasteful number, since it uses less digits than its factorization.

19885800055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68007 (or 67996 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 49.

The spelling of 19885800055 in words is "nineteen billion, eight hundred eighty-five million, eight hundred thousand, fifty-five".