19716216 has 48 divisors (see below), whose sum is σ = 53384760. Its totient is φ = 6065280.

The previous prime is 19716199. The next prime is 19716233. The reversal of 19716216 is 61261791.

It is an interprime number because it is at equal distance from previous prime (19716199) and next prime (19716233).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1626 + ... + 6486.

Almost surely, 2^19716216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19716216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26692380).

19716216 is an abundant number, since it is smaller than the sum of its proper divisors (33668544).

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

19716216 is a wasteful number, since it uses less digits than its factorization.

19716216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4896 (or 4879 counting only the distinct ones).

The product of its digits is 4536, while the sum is 33.

The square root of 19716216 is about 4440.2945848220. The cubic root of 19716216 is about 270.1517939322.

The spelling of 19716216 in words is "nineteen million, seven hundred sixteen thousand, two hundred sixteen".