19914216 has 64 divisors (see below), whose sum is σ = 57456000. Its totient is φ = 5634048.

The previous prime is 19914187. The next prime is 19914217. The reversal of 19914216 is 61241991.

It is not an unprimeable number, because it can be changed into a prime (19914217) 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, 18460 + ... + 19508.

It is an arithmetic number, because the mean of its divisors is an integer number (897750).

Almost surely, 2^19914216 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 19914216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28728000).

19914216 is an abundant number, since it is smaller than the sum of its proper divisors (37541784).

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

19914216 is a wasteful number, since it uses less digits than its factorization.

19914216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178 (or 1174 counting only the distinct ones).

The product of its digits is 3888, while the sum is 33.

The square root of 19914216 is about 4462.5347057474. The cubic root of 19914216 is about 271.0531161346.

The spelling of 19914216 in words is "nineteen million, nine hundred fourteen thousand, two hundred sixteen".