19816844612016 has 40 divisors (see below), whose sum is σ = 51194956998064. Its totient is φ = 6605428838400.

The previous prime is 19816844611987. The next prime is 19816844612017. The reversal of 19816844612016 is 61021644861891.

It is not an unprimeable number, because it can be changed into a prime (19816844612017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4086085 + ... + 7505316.

Almost surely, 2^{19816844612016} is an apocalyptic number.

19816844612016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19816844612016 is an abundant number, since it is smaller than the sum of its proper divisors (31378112386048).

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

19816844612016 is a wasteful number, since it uses less digits than its factorization.

19816844612016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11627029 (or 11627023 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 57.

The spelling of 19816844612016 in words is "nineteen trillion, eight hundred sixteen billion, eight hundred forty-four million, six hundred twelve thousand, sixteen".