19397790720000 has 3780 divisors, whose sum is σ = 90791838505368. Its totient is φ = 3973939200000.

The previous prime is 19397790719971. The next prime is 19397790720001. The reversal of 19397790720000 is 2709779391.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19397790720001) by changing a digit.

It is a polite number, since it can be written in 269 ways as a sum of consecutive naturals, for example, 273208319965 + ... + 273208320035.

Almost surely, 2^{19397790720000} is an apocalyptic number.

19397790720000 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 19397790720000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45395919252684).

19397790720000 is an abundant number, since it is smaller than the sum of its proper divisors (71394047785368).

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

19397790720000 is an equidigital number, since it uses as much as digits as its factorization.

19397790720000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 1500282, while the sum is 54.

The spelling of 19397790720000 in words is "nineteen trillion, three hundred ninety-seven billion, seven hundred ninety million, seven hundred twenty thousand".