20602205 has 8 divisors (see below), whose sum is σ = 26624472. Its totient is φ = 15213888.

The previous prime is 20602189. The next prime is 20602207. The reversal of 20602205 is 50220602.

It can be written as a sum of positive squares in 4 ways, for example, as 198916 + 20403289 = 446^2 + 4517^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20602205 - 2⁴ = 20602189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20602207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158414 + ... + 158543.

It is an arithmetic number, because the mean of its divisors is an integer number (3328059).

Almost surely, 2^20602205 is an apocalyptic number.

It is an amenable number.

20602205 is a deficient number, since it is larger than the sum of its proper divisors (6022267).

20602205 is a wasteful number, since it uses less digits than its factorization.

20602205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316975.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20602205 is about 4538.9651904371. The cubic root of 20602205 is about 274.1392591337.

Adding to 20602205 its reverse (50220602), we get a palindrome (70822807).

The spelling of 20602205 in words is "twenty million, six hundred two thousand, two hundred five".