19809780480 has 432 divisors, whose sum is σ = 78853791744. Its totient is φ = 4497776640.

The previous prime is 19809780401. The next prime is 19809780511. The reversal of 19809780480 is 8408790891.

19809780480 is a `hidden beast` number, since 1 + 9 + 80 + 9 + 7 + 80 + 480 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13466145 + ... + 13467615.

Almost surely, 2^19809780480 is an apocalyptic number.

19809780480 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 19809780480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39426895872).

19809780480 is an abundant number, since it is smaller than the sum of its proper divisors (59044011264).

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

19809780480 is a wasteful number, since it uses less digits than its factorization.

19809780480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672 (or 1655 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The spelling of 19809780480 in words is "nineteen billion, eight hundred nine million, seven hundred eighty thousand, four hundred eighty".