22013320 has 64 divisors (see below), whose sum is σ = 58579200. Its totient is φ = 7284480.

The previous prime is 22013281. The next prime is 22013339. The reversal of 22013320 is 2331022.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 22013320.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6765 + ... + 9475.

It is an arithmetic number, because the mean of its divisors is an integer number (915300).

Almost surely, 2^22013320 is an apocalyptic number.

22013320 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 22013320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29289600).

22013320 is an abundant number, since it is smaller than the sum of its proper divisors (36565880).

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

22013320 is a wasteful number, since it uses less digits than its factorization.

22013320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2758 (or 2754 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 22013320 is about 4691.8354617356. The cubic root of 22013320 is about 280.2604719048.

Adding to 22013320 its reverse (2331022), we get a palindrome (24344342).

The spelling of 22013320 in words is "twenty-two million, thirteen thousand, three hundred twenty".