20305005265 has 8 divisors (see below), whose sum is σ = 24370058880. Its totient is φ = 16241302512.

The previous prime is 20305005223. The next prime is 20305005277. The reversal of 20305005265 is 56250050302.

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 20305005265 - 2¹³ = 20304997073 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304345 + ... + 365014.

It is an arithmetic number, because the mean of its divisors is an integer number (3046257360).

Almost surely, 2^20305005265 is an apocalyptic number.

It is an amenable number.

20305005265 is a deficient number, since it is larger than the sum of its proper divisors (4065053615).

20305005265 is an equidigital number, since it uses as much as digits as its factorization.

20305005265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675431.

The product of its (nonzero) digits is 9000, while the sum is 28.

Adding to 20305005265 its reverse (56250050302), we get a palindrome (76555055567).

The spelling of 20305005265 in words is "twenty billion, three hundred five million, five thousand, two hundred sixty-five".