13321303220 has 48 divisors (see below), whose sum is σ = 28496749008. Its totient is φ = 5229480960.

The previous prime is 13321303187. The next prime is 13321303249. The reversal of 13321303220 is 2230312331.

It can be written as a sum of positive squares in 8 ways, for example, as 88021924 + 13233281296 = 9382^2 + 115036^2 .

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 = 13321303192 and 13321303201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 545594 + ... + 569486.

It is an arithmetic number, because the mean of its divisors is an integer number (593682271).

Almost surely, 2^13321303220 is an apocalyptic number.

13321303220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13321303220 is an abundant number, since it is smaller than the sum of its proper divisors (15175445788).

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

13321303220 is a wasteful number, since it uses less digits than its factorization.

13321303220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24420 (or 24418 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 13321303220 its reverse (2230312331), we get a palindrome (15551615551).

The spelling of 13321303220 in words is "thirteen billion, three hundred twenty-one million, three hundred three thousand, two hundred twenty".