19286648640 has 448 divisors, whose sum is σ = 78067814400. Its totient is φ = 4390889472.

The previous prime is 19286648639. The next prime is 19286648681. The reversal of 19286648640 is 4684668291.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20986101 + ... + 20987019.

Almost surely, 2^19286648640 is an apocalyptic number.

19286648640 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 19286648640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39033907200).

19286648640 is an abundant number, since it is smaller than the sum of its proper divisors (58781165760).

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

19286648640 is a wasteful number, since it uses less digits than its factorization.

19286648640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299 (or 1283 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The spelling of 19286648640 in words is "nineteen billion, two hundred eighty-six million, six hundred forty-eight thousand, six hundred forty".