22320220 has 24 divisors (see below), whose sum is σ = 50478624. Its totient is φ = 8241216.

The previous prime is 22320211. The next prime is 22320223. The reversal of 22320220 is 2202322.

It is a super-3 number, since 3×22320220³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 22320220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22320223) 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 7 ways as a sum of consecutive naturals, for example, 42664 + ... + 43183.

It is an arithmetic number, because the mean of its divisors is an integer number (2103276).

Almost surely, 2^22320220 is an apocalyptic number.

22320220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22320220 is an abundant number, since it is smaller than the sum of its proper divisors (28158404).

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

22320220 is a wasteful number, since it uses less digits than its factorization.

22320220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85869 (or 85867 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 22320220 is about 4724.4280077063. The cubic root of 22320220 is about 281.5568883887.

Adding to 22320220 its reverse (2202322), we get a palindrome (24522542).

The spelling of 22320220 in words is "twenty-two million, three hundred twenty thousand, two hundred twenty".