19820216 has 16 divisors (see below), whose sum is σ = 40021800. Its totient is φ = 9147744.

The previous prime is 19820167. The next prime is 19820219. The reversal of 19820216 is 61202891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19820219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95186 + ... + 95393.

Almost surely, 2^19820216 is an apocalyptic number.

It is an amenable number.

19820216 is an abundant number, since it is smaller than the sum of its proper divisors (20201584).

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

19820216 is a wasteful number, since it uses less digits than its factorization.

19820216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190598 (or 190594 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 19820216 is about 4451.9901167905. The cubic root of 19820216 is about 270.6259642042.

The spelling of 19820216 in words is "nineteen million, eight hundred twenty thousand, two hundred sixteen".