19809488384 has 60 divisors (see below), whose sum is σ = 45253861752. Its totient is φ = 8486169600.

The previous prime is 19809488381. The next prime is 19809488389. The reversal of 19809488384 is 48388490891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19809488381) 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, 8424809 + ... + 8427159.

Almost surely, 2^19809488384 is an apocalyptic number.

19809488384 is a gapful number since it is divisible by the number (14) 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 19809488384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22626930876).

19809488384 is an abundant number, since it is smaller than the sum of its proper divisors (25444373368).

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

19809488384 is an frugal number, since it uses more digits than its factorization.

19809488384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4727 (or 2360 counting only the distinct ones).

The product of its (nonzero) digits is 15925248, while the sum is 62.

The spelling of 19809488384 in words is "nineteen billion, eight hundred nine million, four hundred eighty-eight thousand, three hundred eighty-four".