13636220 has 48 divisors (see below), whose sum is σ = 31116960. Its totient is φ = 4989696.

The previous prime is 13636219. The next prime is 13636223. The reversal of 13636220 is 2263631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13636223) 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, 46394 + ... + 46686.

It is an arithmetic number, because the mean of its divisors is an integer number (648270).

Almost surely, 2^13636220 is an apocalyptic number.

13636220 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 13636220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15558480).

13636220 is an abundant number, since it is smaller than the sum of its proper divisors (17480740).

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

13636220 is a wasteful number, since it uses less digits than its factorization.

13636220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494 (or 492 counting only the distinct ones).

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

The square root of 13636220 is about 3692.7252808732. The cubic root of 13636220 is about 238.9083523192.

Adding to 13636220 its reverse (2263631), we get a palindrome (15899851).

The spelling of 13636220 in words is "thirteen million, six hundred thirty-six thousand, two hundred twenty".