19804369984 has 105 divisors (see below), whose sum is σ = 45974513207. Its totient is φ = 8463944832.

The previous prime is 19804369927. The next prime is 19804369993. The reversal of 19804369984 is 48996340891.

The square root of 19804369984 is 140728.

It is a perfect power (a square), and thus also a powerful number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 55165197 + ... + 55165555.

Almost surely, 2^19804369984 is an apocalyptic number.

19804369984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19804369984 is the 140728-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19804369984

19804369984 is an abundant number, since it is smaller than the sum of its proper divisors (26170143223).

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

19804369984 is an frugal number, since it uses more digits than its factorization.

19804369984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 61.

The spelling of 19804369984 in words is "nineteen billion, eight hundred four million, three hundred sixty-nine thousand, nine hundred eighty-four".