22109912 has 32 divisors (see below), whose sum is σ = 46284480. Its totient is φ = 9814560.

The previous prime is 22109909. The next prime is 22109921. The reversal of 22109912 is 21990122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 863 + ... + 6705.

It is an arithmetic number, because the mean of its divisors is an integer number (1446390).

Almost surely, 2^22109912 is an apocalyptic number.

22109912 is a gapful number since it is divisible by the number (22) 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 22109912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23142240).

22109912 is an abundant number, since it is smaller than the sum of its proper divisors (24174568).

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

22109912 is a wasteful number, since it uses less digits than its factorization.

22109912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5903 (or 5899 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 22109912 is about 4702.1178207272. The cubic root of 22109912 is about 280.6697910657.

The spelling of 22109912 in words is "twenty-two million, one hundred nine thousand, nine hundred twelve".