19782986380800 has 120 divisors (see below), whose sum is σ = 65351859199176. Its totient is φ = 5275463024640.

The previous prime is 19782986380777. The next prime is 19782986380811. The reversal of 19782986380800 is 808368928791.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 257552569 + ... + 257629368.

Almost surely, 2^{19782986380800} is an apocalyptic number.

19782986380800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19782986380800 is an abundant number, since it is smaller than the sum of its proper divisors (45568872818376).

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

19782986380800 is an equidigital number, since it uses as much as digits as its factorization.

19782986380800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515181968 (or 515181947 counting only the distinct ones).

The product of its (nonzero) digits is 83607552, while the sum is 69.

The spelling of 19782986380800 in words is "nineteen trillion, seven hundred eighty-two billion, nine hundred eighty-six million, three hundred eighty thousand, eight hundred".