22020306 has 72 divisors (see below), whose sum is σ = 56402640. Its totient is φ = 5710320.

The previous prime is 22020293. The next prime is 22020311. The reversal of 22020306 is 60302022.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 35265 + ... + 35883.

It is an arithmetic number, because the mean of its divisors is an integer number (783370).

Almost surely, 2^22020306 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22020306, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28201320).

22020306 is an abundant number, since it is smaller than the sum of its proper divisors (34382334).

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

22020306 is a wasteful number, since it uses less digits than its factorization.

22020306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660 (or 642 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 22020306 is about 4692.5798874393. The cubic root of 22020306 is about 280.2901159654.

Adding to 22020306 its reverse (60302022), we get a palindrome (82322328).

The spelling of 22020306 in words is "twenty-two million, twenty thousand, three hundred six".