19989497915000 has 160 divisors (see below), whose sum is σ = 49141775723040. Its totient is φ = 7605892800000.

The previous prime is 19989497914907. The next prime is 19989497915011. The reversal of 19989497915000 is 51979498991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 20334830 + ... + 21295170.

It is an arithmetic number, because the mean of its divisors is an integer number (307136098269).

Almost surely, 2^{19989497915000} is an apocalyptic number.

19989497915000 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 19989497915000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24570887861520).

19989497915000 is an abundant number, since it is smaller than the sum of its proper divisors (29152277808040).

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

19989497915000 is a wasteful number, since it uses less digits than its factorization.

19989497915000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960571 (or 960552 counting only the distinct ones).

The product of its (nonzero) digits is 66134880, while the sum is 71.

The spelling of 19989497915000 in words is "nineteen trillion, nine hundred eighty-nine billion, four hundred ninety-seven million, nine hundred fifteen thousand".