13120322020 has 24 divisors (see below), whose sum is σ = 29672113464. Its totient is φ = 4844426496.

The previous prime is 13120321993. The next prime is 13120322021. The reversal of 13120322020 is 2022302131.

It can be written as a sum of positive squares in 4 ways, for example, as 2717953956 + 10402368064 = 52134^2 + 101992^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13120321985 and 13120322003.

It is not an unprimeable number, because it can be changed into a prime (13120322021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25231129 + ... + 25231648.

It is an arithmetic number, because the mean of its divisors is an integer number (1236338061).

Almost surely, 2^13120322020 is an apocalyptic number.

13120322020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13120322020 is an abundant number, since it is smaller than the sum of its proper divisors (16551791444).

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

13120322020 is a wasteful number, since it uses less digits than its factorization.

13120322020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50462799 (or 50462797 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 13120322020 its reverse (2022302131), we get a palindrome (15142624151).

The spelling of 13120322020 in words is "thirteen billion, one hundred twenty million, three hundred twenty-two thousand, twenty".