19889455800 has 48 divisors (see below), whose sum is σ = 61657314840. Its totient is φ = 5303854720.

The previous prime is 19889455771. The next prime is 19889455801. The reversal of 19889455800 is 855498891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19889455801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16573947 + ... + 16575146.

Almost surely, 2^19889455800 is an apocalyptic number.

19889455800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19889455800 is an abundant number, since it is smaller than the sum of its proper divisors (41767859040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19889455800 is a wasteful number, since it uses less digits than its factorization.

19889455800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33149112 (or 33149103 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 57.

The spelling of 19889455800 in words is "nineteen billion, eight hundred eighty-nine million, four hundred fifty-five thousand, eight hundred".