22109916 has 12 divisors (see below), whose sum is σ = 51589832. Its totient is φ = 7369968.

The previous prime is 22109909. The next prime is 22109921. The reversal of 22109916 is 61990122.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 921235 + ... + 921258.

Almost surely, 2^22109916 is an apocalyptic number.

It is an amenable number.

22109916 is an abundant number, since it is smaller than the sum of its proper divisors (29479916).

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

22109916 is a wasteful number, since it uses less digits than its factorization.

22109916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842500 (or 1842498 counting only the distinct ones).

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

The square root of 22109916 is about 4702.1182460674. The cubic root of 22109916 is about 280.6698079915.

The spelling of 22109916 in words is "twenty-two million, one hundred nine thousand, nine hundred sixteen".