19616016 has 80 divisors (see below), whose sum is σ = 58726400. Its totient is φ = 5526144.

The previous prime is 19615993. The next prime is 19616017. The reversal of 19616016 is 61061691.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (19616017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26175 + ... + 26913.

It is an arithmetic number, because the mean of its divisors is an integer number (734080).

Almost surely, 2^19616016 is an apocalyptic number.

19616016 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 19616016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29363200).

19616016 is an abundant number, since it is smaller than the sum of its proper divisors (39110384).

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

19616016 is a wasteful number, since it uses less digits than its factorization.

19616016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836 (or 830 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 19616016 is about 4428.9971776916. The cubic root of 19616016 is about 269.6933693219.

The spelling of 19616016 in words is "nineteen million, six hundred sixteen thousand, sixteen".