20265211 has 4 divisors (see below), whose sum is σ = 20493000. Its totient is φ = 20037424.

The previous prime is 20265199. The next prime is 20265247. The reversal of 20265211 is 11256202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11256202 = 2 ⋅5628101.

It is a cyclic number.

It is not a de Polignac number, because 20265211 - 2¹⁷ = 20134139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20265611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113761 + ... + 113938.

It is an arithmetic number, because the mean of its divisors is an integer number (5123250).

Almost surely, 2^20265211 is an apocalyptic number.

20265211 is a deficient number, since it is larger than the sum of its proper divisors (227789).

20265211 is an equidigital number, since it uses as much as digits as its factorization.

20265211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227788.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 20265211 is about 4501.6897938441. The cubic root of 20265211 is about 272.6363193038.

Subtracting from 20265211 its reverse (11256202), we obtain a palindrome (9009009).

The spelling of 20265211 in words is "twenty million, two hundred sixty-five thousand, two hundred eleven".