13356220 has 48 divisors (see below), whose sum is σ = 30004128. Its totient is φ = 4976640.

The previous prime is 13356197. The next prime is 13356229. The reversal of 13356220 is 2265331.

13356220 is nontrivially palindromic in base 16.

It is a super-2 number, since 2×13356220² = 356777225376800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13356191 and 13356200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13356229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55300 + ... + 55540.

It is an arithmetic number, because the mean of its divisors is an integer number (625086).

Almost surely, 2^13356220 is an apocalyptic number.

13356220 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 13356220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15002064).

13356220 is an abundant number, since it is smaller than the sum of its proper divisors (16647908).

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

13356220 is a wasteful number, since it uses less digits than its factorization.

13356220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430 (or 428 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 13356220 is about 3654.6162589251. The cubic root of 13356220 is about 237.2618184632.

The spelling of 13356220 in words is "thirteen million, three hundred fifty-six thousand, two hundred twenty".