13223203220 has 24 divisors (see below), whose sum is σ = 27771261000. Its totient is φ = 5288798592.

The previous prime is 13223203199. The next prime is 13223203243. The reversal of 13223203220 is 2230232231.

It can be written as a sum of positive squares in 4 ways, for example, as 2010087556 + 11213115664 = 44834^2 + 105892^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 13223203192 and 13223203201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264806 + ... + 310754.

It is an arithmetic number, because the mean of its divisors is an integer number (1157135875).

Almost surely, 2^13223203220 is an apocalyptic number.

13223203220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13223203220 is an abundant number, since it is smaller than the sum of its proper divisors (14548057780).

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

13223203220 is a wasteful number, since it uses less digits than its factorization.

13223203220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60347 (or 60345 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 13223203220 its reverse (2230232231), we get a palindrome (15453435451).

The spelling of 13223203220 in words is "thirteen billion, two hundred twenty-three million, two hundred three thousand, two hundred twenty".