19868520000 has 840 divisors, whose sum is σ = 79603518720. Its totient is φ = 4354560000.

The previous prime is 19868519959. The next prime is 19868520013. The reversal of 19868520000 is 2586891.

It is a tau number, because it is divible by the number of its divisors (840).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 182279946 + ... + 182280054.

Almost surely, 2^19868520000 is an apocalyptic number.

19868520000 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 19868520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39801759360).

19868520000 is an abundant number, since it is smaller than the sum of its proper divisors (59734998720).

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

19868520000 is a wasteful number, since it uses less digits than its factorization.

19868520000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The spelling of 19868520000 in words is "nineteen billion, eight hundred sixty-eight million, five hundred twenty thousand".