22179912 has 48 divisors (see below), whose sum is σ = 57998640. Its totient is φ = 7067808.

The previous prime is 22179901. The next prime is 22179919. The reversal of 22179912 is 21997122.

It is not an unprimeable number, because it can be changed into a prime (22179919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11823 + ... + 13569.

It is an arithmetic number, because the mean of its divisors is an integer number (1208305).

Almost surely, 2^22179912 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 22179912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28999320).

22179912 is an abundant number, since it is smaller than the sum of its proper divisors (35818728).

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

22179912 is a wasteful number, since it uses less digits than its factorization.

22179912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1802 (or 1775 counting only the distinct ones).

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

The square root of 22179912 is about 4709.5553930281. Note that the first 3 decimals coincide. The cubic root of 22179912 is about 280.9656792892.

The spelling of 22179912 in words is "twenty-two million, one hundred seventy-nine thousand, nine hundred twelve".