20265305 has 8 divisors (see below), whose sum is σ = 25598400. Its totient is φ = 15358896.

The previous prime is 20265299. The next prime is 20265391. The reversal of 20265305 is 50356202.

It is a happy number.

20265305 is nontrivially palindromic in base 2.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20265305 - 2¹⁶ = 20199769 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106565 + ... + 106754.

It is an arithmetic number, because the mean of its divisors is an integer number (3199800).

Almost surely, 2^20265305 is an apocalyptic number.

It is an amenable number.

20265305 is a deficient number, since it is larger than the sum of its proper divisors (5333095).

20265305 is a wasteful number, since it uses less digits than its factorization.

20265305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213343.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 20265305 is about 4501.7002343559. The cubic root of 20265305 is about 272.6367408435.

The spelling of 20265305 in words is "twenty million, two hundred sixty-five thousand, three hundred five".