19687704960 has 256 divisors, whose sum is σ = 78240038400. Its totient is φ = 4090920960.

The previous prime is 19687704941. The next prime is 19687704977. The reversal of 19687704960 is 6940778691.

It is a self number, because there is not a number n which added to its sum of digits gives 19687704960.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81256 + ... + 214424.

It is an arithmetic number, because the mean of its divisors is an integer number (305625150).

Almost surely, 2^19687704960 is an apocalyptic number.

19687704960 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 19687704960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39120019200).

19687704960 is an abundant number, since it is smaller than the sum of its proper divisors (58552333440).

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

19687704960 is a wasteful number, since it uses less digits than its factorization.

19687704960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133209 (or 133197 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 57.

The spelling of 19687704960 in words is "nineteen billion, six hundred eighty-seven million, seven hundred four thousand, nine hundred sixty".