20550440205 has 32 divisors (see below), whose sum is σ = 36895864320. Its totient is φ = 10851710400.

The previous prime is 20550440203. The next prime is 20550440227. The reversal of 20550440205 is 50204405502.

20550440205 is a `hidden beast` number, since 205 + 50 + 4 + 402 + 0 + 5 = 666.

It is not a de Polignac number, because 20550440205 - 2¹ = 20550440203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20550440203) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 739957 + ... + 767226.

It is an arithmetic number, because the mean of its divisors is an integer number (1152995760).

Almost surely, 2^20550440205 is an apocalyptic number.

It is an amenable number.

20550440205 is a deficient number, since it is larger than the sum of its proper divisors (16345424115).

20550440205 is a wasteful number, since it uses less digits than its factorization.

20550440205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507298 (or 1507292 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

Adding to 20550440205 its reverse (50204405502), we get a palindrome (70754845707).

The spelling of 20550440205 in words is "twenty billion, five hundred fifty million, four hundred forty thousand, two hundred five".