19947803904000 has 2304 divisors, whose sum is σ = 89738162841600. Its totient is φ = 4317732864000.

The previous prime is 19947803903893. The next prime is 19947803904029. The reversal of 19947803904000 is 40930874991.

19947803904000 is a `hidden beast` number, since 1 + 99 + 47 + 80 + 39 + 0 + 400 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (2304).

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 (13) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 8273662795 + ... + 8273665205.

It is an arithmetic number, because the mean of its divisors is an integer number (38948855400).

Almost surely, 2^{19947803904000} is an apocalyptic number.

19947803904000 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 19947803904000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44869081420800).

19947803904000 is an abundant number, since it is smaller than the sum of its proper divisors (69790358937600).

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

19947803904000 is an equidigital number, since it uses as much as digits as its factorization.

19947803904000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2489 (or 2447 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 19947803904000 in words is "nineteen trillion, nine hundred forty-seven billion, eight hundred three million, nine hundred four thousand".