20205206 has 16 divisors (see below), whose sum is σ = 35375616. Its totient is φ = 8474856.

The previous prime is 20205193. The next prime is 20205223. The reversal of 20205206 is 60250202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14696 + ... + 16011.

It is an arithmetic number, because the mean of its divisors is an integer number (2210976).

Almost surely, 2^20205206 is an apocalyptic number.

20205206 is a deficient number, since it is larger than the sum of its proper divisors (15170410).

20205206 is a wasteful number, since it uses less digits than its factorization.

20205206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30763.

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

The square root of 20205206 is about 4495.0201334366. The cubic root of 20205206 is about 272.3669625270.

Adding to 20205206 its reverse (60250202), we get a palindrome (80455408).

The spelling of 20205206 in words is "twenty million, two hundred five thousand, two hundred six".