19487786688 has 42 divisors (see below), whose sum is σ = 55858223564. Its totient is φ = 6495928704.

The previous prime is 19487786687. The next prime is 19487786723. The reversal of 19487786688 is 88668778491.

19487786688 is a `hidden beast` number, since 1 + 9 + 487 + 7 + 8 + 66 + 88 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a zygodrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (19487786687) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16915906 + ... + 16917057.

Almost surely, 2^19487786688 is an apocalyptic number.

19487786688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19487786688 is an abundant number, since it is smaller than the sum of its proper divisors (36370436876).

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

19487786688 is a wasteful number, since it uses less digits than its factorization.

19487786688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33832981 (or 33832968 counting only the distinct ones).

The product of its digits is 260112384, while the sum is 72.

The spelling of 19487786688 in words is "nineteen billion, four hundred eighty-seven million, seven hundred eighty-six thousand, six hundred eighty-eight".