19982018016 has 144 divisors (see below), whose sum is σ = 61339692960. Its totient is φ = 6151326720.

The previous prime is 19982018011. The next prime is 19982018033. The reversal of 19982018016 is 61081028991.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19982018011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140086 + ... + 244106.

It is an arithmetic number, because the mean of its divisors is an integer number (425970090).

Almost surely, 2^19982018016 is an apocalyptic number.

19982018016 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 19982018016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30669846480).

19982018016 is an abundant number, since it is smaller than the sum of its proper divisors (41357674944).

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

19982018016 is a wasteful number, since it uses less digits than its factorization.

19982018016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104089 (or 104078 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 45.

The spelling of 19982018016 in words is "nineteen billion, nine hundred eighty-two million, eighteen thousand, sixteen".