19731368016 has 100 divisors (see below), whose sum is σ = 57146154912. Its totient is φ = 6572764224.

The previous prime is 19731367993. The next prime is 19731368057. The reversal of 19731368016 is 61086313791.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2389591 + ... + 2397833.

Almost surely, 2^19731368016 is an apocalyptic number.

19731368016 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 19731368016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28573077456).

19731368016 is an abundant number, since it is smaller than the sum of its proper divisors (37414786896).

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

19731368016 is a wasteful number, since it uses less digits than its factorization.

19731368016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10110 (or 10095 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The spelling of 19731368016 in words is "nineteen billion, seven hundred thirty-one million, three hundred sixty-eight thousand, sixteen".