22120452 has 60 divisors (see below), whose sum is σ = 58747920. Its totient is φ = 7256304.

The previous prime is 22120433. The next prime is 22120459. The reversal of 22120452 is 25402122.

22120452 is a `hidden beast` number, since 2 + 212 + 0 + 452 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22120459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 21199 + ... + 22217.

It is an arithmetic number, because the mean of its divisors is an integer number (979132).

Almost surely, 2^22120452 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 22120452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29373960).

22120452 is an abundant number, since it is smaller than the sum of its proper divisors (36627468).

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

22120452 is a wasteful number, since it uses less digits than its factorization.

22120452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102 (or 1091 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 22120452 is about 4703.2384587643. The cubic root of 22120452 is about 280.7143832777.

Adding to 22120452 its reverse (25402122), we get a palindrome (47522574).

The spelling of 22120452 in words is "twenty-two million, one hundred twenty thousand, four hundred fifty-two".