20566244505 has 16 divisors (see below), whose sum is σ = 34040681280. Its totient is φ = 10590433728.

The previous prime is 20566244467. The next prime is 20566244507. The reversal of 20566244505 is 50544266502.

It is not a de Polignac number, because 20566244505 - 2⁶ = 20566244441 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20566244507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23638927 + ... + 23639796.

It is an arithmetic number, because the mean of its divisors is an integer number (2127542580).

Almost surely, 2^20566244505 is an apocalyptic number.

It is an amenable number.

20566244505 is a deficient number, since it is larger than the sum of its proper divisors (13474436775).

20566244505 is a wasteful number, since it uses less digits than its factorization.

20566244505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47278760.

The product of its (nonzero) digits is 288000, while the sum is 39.

The spelling of 20566244505 in words is "twenty billion, five hundred sixty-six million, two hundred forty-four thousand, five hundred five".