20650205 has 16 divisors (see below), whose sum is σ = 26196480. Its totient is φ = 15595008.

The previous prime is 20650193. The next prime is 20650213. The reversal of 20650205 is 50205602.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20650205 - 2⁶ = 20650141 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7949 + ... + 10221.

It is an arithmetic number, because the mean of its divisors is an integer number (1637280).

Almost surely, 2^20650205 is an apocalyptic number.

It is an amenable number.

20650205 is a deficient number, since it is larger than the sum of its proper divisors (5546275).

20650205 is a wasteful number, since it uses less digits than its factorization.

20650205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2380.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 20650205 is about 4544.2496630357. The cubic root of 20650205 is about 274.3519949129.

Adding to 20650205 its reverse (50205602), we get a palindrome (70855807).

The spelling of 20650205 in words is "twenty million, six hundred fifty thousand, two hundred five".