22323420 has 108 divisors (see below), whose sum is σ = 78800904. Its totient is φ = 5100480.

The previous prime is 22323403. The next prime is 22323421. The reversal of 22323420 is 2432322.

22323420 is a `hidden beast` number, since 223 + 23 + 420 = 666.

It is a super-3 number, since 3×22323420³ (a number of 23 digits) contains 333 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 22323393 and 22323402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22323421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7555 + ... + 10085.

It is an arithmetic number, because the mean of its divisors is an integer number (729638).

Almost surely, 2^22323420 is an apocalyptic number.

22323420 is a gapful number since it is divisible by the number (20) 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 22323420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39400452).

22323420 is an abundant number, since it is smaller than the sum of its proper divisors (56477484).

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

22323420 is a wasteful number, since it uses less digits than its factorization.

22323420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560 (or 2548 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 22323420 is about 4724.7666609051. The cubic root of 22323420 is about 281.5703431395.

Adding to 22323420 its reverse (2432322), we get a palindrome (24755742).

The spelling of 22323420 in words is "twenty-two million, three hundred twenty-three thousand, four hundred twenty".