20205265 has 16 divisors (see below), whose sum is σ = 27025920. Its totient is φ = 14411520.

The previous prime is 20205259. The next prime is 20205281. The reversal of 20205265 is 56250202.

It is not a de Polignac number, because 20205265 - 2⁹ = 20204753 is a prime.

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, 4641 + ... + 7870.

It is an arithmetic number, because the mean of its divisors is an integer number (1689120).

Almost surely, 2^20205265 is an apocalyptic number.

It is an amenable number.

20205265 is a deficient number, since it is larger than the sum of its proper divisors (6820655).

20205265 is a wasteful number, since it uses less digits than its factorization.

20205265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12552.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 20205265 is about 4495.0266962500. The cubic root of 20205265 is about 272.3672276342.

Adding to 20205265 its reverse (56250202), we get a palindrome (76455467).

The spelling of 20205265 in words is "twenty million, two hundred five thousand, two hundred sixty-five".