13312020 has 96 divisors (see below), whose sum is σ = 40836096. Its totient is φ = 3225600.

The previous prime is 13312001. The next prime is 13312021. The reversal of 13312020 is 2021331.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 13311987 and 13312005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13312021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31410 + ... + 31830.

It is an arithmetic number, because the mean of its divisors is an integer number (425376).

Almost surely, 2^13312020 is an apocalyptic number.

13312020 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 13312020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20418048).

13312020 is an abundant number, since it is smaller than the sum of its proper divisors (27524076).

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

13312020 is a wasteful number, since it uses less digits than its factorization.

13312020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481 (or 479 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 13312020 is about 3648.5641011225. The cubic root of 13312020 is about 236.9998041623. Note that the first 3 decimals are identical.

Adding to 13312020 its reverse (2021331), we get a palindrome (15333351).

The spelling of 13312020 in words is "thirteen million, three hundred twelve thousand, twenty".