19381660896 has 144 divisors (see below), whose sum is σ = 55308763440. Its totient is φ = 5940080640.

The previous prime is 19381660891. The next prime is 19381660957. The reversal of 19381660896 is 69806618391.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19381660891) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4362036 + ... + 4366476.

It is an arithmetic number, because the mean of its divisors is an integer number (384088635).

Almost surely, 2^19381660896 is an apocalyptic number.

19381660896 is a gapful number since it is divisible by the number (16) 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 19381660896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27654381720).

19381660896 is an abundant number, since it is smaller than the sum of its proper divisors (35927102544).

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

19381660896 is a wasteful number, since it uses less digits than its factorization.

19381660896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4749 (or 4728 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 57.

The spelling of 19381660896 in words is "nineteen billion, three hundred eighty-one million, six hundred sixty thousand, eight hundred ninety-six".