19984494537216 has 480 divisors, whose sum is σ = 64466851857408. Its totient is φ = 5907387064320.

The previous prime is 19984494537209. The next prime is 19984494537233. The reversal of 19984494537216 is 61273549448991.

19984494537216 is a `hidden beast` number, since 1 + 9 + 9 + 8 + 4 + 494 + 53 + 72 + 16 = 666.

It is a super-2 number, since 2×19984494537216² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1802510425 + ... + 1802521511.

Almost surely, 2^{19984494537216} is an apocalyptic number.

19984494537216 is a gapful number since it is divisible by the number (16) 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 19984494537216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32233425928704).

19984494537216 is an abundant number, since it is smaller than the sum of its proper divisors (44482357320192).

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

19984494537216 is a wasteful number, since it uses less digits than its factorization.

19984494537216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11992 (or 11973 counting only the distinct ones).

The product of its digits is 470292480, while the sum is 72.

The spelling of 19984494537216 in words is "nineteen trillion, nine hundred eighty-four billion, four hundred ninety-four million, five hundred thirty-seven thousand, two hundred sixteen".