13366220 has 72 divisors (see below), whose sum is σ = 34128864. Its totient is φ = 4376064.

The previous prime is 13366201. The next prime is 13366271. The reversal of 13366220 is 2266331.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22244 + ... + 22836.

It is an arithmetic number, because the mean of its divisors is an integer number (474012).

Almost surely, 2^13366220 is an apocalyptic number.

13366220 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 13366220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17064432).

13366220 is an abundant number, since it is smaller than the sum of its proper divisors (20762644).

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

13366220 is a wasteful number, since it uses less digits than its factorization.

13366220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 630 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 13366220 is about 3655.9841356330. The cubic root of 13366220 is about 237.3210175054.

The spelling of 13366220 in words is "thirteen million, three hundred sixty-six thousand, two hundred twenty".