19409864880 has 320 divisors, whose sum is σ = 70443491328. Its totient is φ = 4329676800.

The previous prime is 19409864879. The next prime is 19409864893. The reversal of 19409864880 is 8846890491.

It is a self number, because there is not a number n which added to its sum of digits gives 19409864880.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12385857 + ... + 12387423.

Almost surely, 2^19409864880 is an apocalyptic number.

19409864880 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 19409864880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35221745664).

19409864880 is an abundant number, since it is smaller than the sum of its proper divisors (51033626448).

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

19409864880 is a wasteful number, since it uses less digits than its factorization.

19409864880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1764 (or 1758 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 57.

The spelling of 19409864880 in words is "nineteen billion, four hundred nine million, eight hundred sixty-four thousand, eight hundred eighty".