19988718750000 has 2400 divisors, whose sum is σ = 95208740250624. Its totient is φ = 3780000000000.

The previous prime is 19988718749977. The next prime is 19988718750127. The reversal of 19988718750000 is 5781788991.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 19988718750000.

It is an unprimeable number.

It is a polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 281531249965 + ... + 281531250035.

Almost surely, 2^{19988718750000} is an apocalyptic number.

19988718750000 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 19988718750000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47604370125312).

19988718750000 is an abundant number, since it is smaller than the sum of its proper divisors (75220021500624).

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

19988718750000 is an frugal number, since it uses more digits than its factorization.

19988718750000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 63.

The spelling of 19988718750000 in words is "nineteen trillion, nine hundred eighty-eight billion, seven hundred eighteen million, seven hundred fifty thousand".