13220320020 has 96 divisors (see below), whose sum is σ = 37506672000. Its totient is φ = 3479084544.

The previous prime is 13220320019. The next prime is 13220320049. The reversal of 13220320020 is 2002302231.

13220320020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13220320020² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1398871 + ... + 1408289.

It is an arithmetic number, because the mean of its divisors is an integer number (390694500).

Almost surely, 2^13220320020 is an apocalyptic number.

13220320020 is a gapful number since it is divisible by the number (10) 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 13220320020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18753336000).

13220320020 is an abundant number, since it is smaller than the sum of its proper divisors (24286351980).

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

13220320020 is a wasteful number, since it uses less digits than its factorization.

13220320020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9737 (or 9735 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 13220320020 its reverse (2002302231), we get a palindrome (15222622251).

The spelling of 13220320020 in words is "thirteen billion, two hundred twenty million, three hundred twenty thousand, twenty".