13620205 has 16 divisors (see below), whose sum is σ = 16848000. Its totient is φ = 10565568.

The previous prime is 13620199. The next prime is 13620223. The reversal of 13620205 is 50202631.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13620205 - 2³ = 13620197 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 27046 + ... + 27544.

It is an arithmetic number, because the mean of its divisors is an integer number (1053000).

Almost surely, 2^13620205 is an apocalyptic number.

It is an amenable number.

13620205 is a deficient number, since it is larger than the sum of its proper divisors (3227795).

13620205 is a wasteful number, since it uses less digits than its factorization.

13620205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 13620205 is about 3690.5561911452. The cubic root of 13620205 is about 238.8147873846.

Adding to 13620205 its reverse (50202631), we get a palindrome (63822836).

The spelling of 13620205 in words is "thirteen million, six hundred twenty thousand, two hundred five".