19987208690880 has 224 divisors, whose sum is σ = 64257348833280. Its totient is φ = 5263309496320.

The previous prime is 19987208690851. The next prime is 19987208691007. The reversal of 19987208690880 is 8809680278991.

It is a super-2 number, since 2×19987208690880² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24722491 + ... + 25518149.

Almost surely, 2^{19987208690880} is an apocalyptic number.

19987208690880 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 19987208690880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32128674416640).

19987208690880 is an abundant number, since it is smaller than the sum of its proper divisors (44270140142400).

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

19987208690880 is a wasteful number, since it uses less digits than its factorization.

19987208690880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796007 (or 795997 counting only the distinct ones).

The product of its (nonzero) digits is 250822656, while the sum is 75.

The spelling of 19987208690880 in words is "nineteen trillion, nine hundred eighty-seven billion, two hundred eight million, six hundred ninety thousand, eight hundred eighty".