20242265 has 4 divisors (see below), whose sum is σ = 24290724. Its totient is φ = 16193808.

The previous prime is 20242253. The next prime is 20242273. The reversal of 20242265 is 56224202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3701776 + 16540489 = 1924^2 + 4067^2 .

It is a cyclic number.

It is not a de Polignac number, because 20242265 - 2⁸ = 20242009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20242265.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2024222 + ... + 2024231.

It is an arithmetic number, because the mean of its divisors is an integer number (6072681).

Almost surely, 2^20242265 is an apocalyptic number.

It is an amenable number.

20242265 is a deficient number, since it is larger than the sum of its proper divisors (4048459).

20242265 is an equidigital number, since it uses as much as digits as its factorization.

20242265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4048458.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 20242265 is about 4499.1404734682. The cubic root of 20242265 is about 272.5333797451.

Adding to 20242265 its reverse (56224202), we get a palindrome (76466467).

The spelling of 20242265 in words is "twenty million, two hundred forty-two thousand, two hundred sixty-five".