19895563000 has 64 divisors (see below), whose sum is σ = 46607296320. Its totient is φ = 7949392000.

The previous prime is 19895562991. The next prime is 19895563027. The reversal of 19895563000 is 36559891.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 930429 + ... + 951571.

It is an arithmetic number, because the mean of its divisors is an integer number (728239005).

Almost surely, 2^19895563000 is an apocalyptic number.

19895563000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19895563000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23303648160).

19895563000 is an abundant number, since it is smaller than the sum of its proper divisors (26711733320).

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

19895563000 is a wasteful number, since it uses less digits than its factorization.

19895563000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22105 (or 22091 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 46.

The spelling of 19895563000 in words is "nineteen billion, eight hundred ninety-five million, five hundred sixty-three thousand".