22013321320 has 64 divisors (see below), whose sum is σ = 50398002000. Its totient is φ = 8651335680.

The previous prime is 22013321299. The next prime is 22013321327. The reversal of 22013321320 is 2312331022.

It can be written as a sum of positive squares in 8 ways, for example, as 11213539236 + 10799782084 = 105894^2 + 103922^2 .

It is not an unprimeable number, because it can be changed into a prime (22013321327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2428156 + ... + 2437204.

Almost surely, 2^22013321320 is an apocalyptic number.

22013321320 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 22013321320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25199001000).

22013321320 is an abundant number, since it is smaller than the sum of its proper divisors (28384680680).

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

22013321320 is a wasteful number, since it uses less digits than its factorization.

22013321320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10118 (or 10114 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 22013321320 its reverse (2312331022), we get a palindrome (24325652342).

The spelling of 22013321320 in words is "twenty-two billion, thirteen million, three hundred twenty-one thousand, three hundred twenty".