19379681280 has 144 divisors (see below), whose sum is σ = 67166812440. Its totient is φ = 5167890432.

The previous prime is 19379681261. The next prime is 19379681303. The reversal of 19379681280 is 8218697391.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12982 + ... + 197301.

Almost surely, 2^19379681280 is an apocalyptic number.

19379681280 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 19379681280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33583406220).

19379681280 is an abundant number, since it is smaller than the sum of its proper divisors (47787131160).

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

19379681280 is a wasteful number, since it uses less digits than its factorization.

19379681280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210316 (or 210293 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The spelling of 19379681280 in words is "nineteen billion, three hundred seventy-nine million, six hundred eighty-one thousand, two hundred eighty".