20434265 has 4 divisors (see below), whose sum is σ = 24521124. Its totient is φ = 16347408.

The previous prime is 20434259. The next prime is 20434319. The reversal of 20434265 is 56243402.

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 8128201 + 12306064 = 2851^2 + 3508^2 .

It is a cyclic number.

It is not a de Polignac number, because 20434265 - 2¹⁰ = 20433241 is a prime.

It is a Duffinian number.

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, 2043422 + ... + 2043431.

It is an arithmetic number, because the mean of its divisors is an integer number (6130281).

Almost surely, 2^20434265 is an apocalyptic number.

It is an amenable number.

20434265 is a deficient number, since it is larger than the sum of its proper divisors (4086859).

20434265 is an equidigital number, since it uses as much as digits as its factorization.

20434265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4086858.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 20434265 is about 4520.4275240291. The cubic root of 20434265 is about 273.3923388708.

Adding to 20434265 its reverse (56243402), we get a palindrome (76677667).

The spelling of 20434265 in words is "twenty million, four hundred thirty-four thousand, two hundred sixty-five".