205000663240 has 32 divisors (see below), whose sum is σ = 462037322880. Its totient is φ = 81860562112.

The previous prime is 205000663211. The next prime is 205000663253. The reversal of 205000663240 is 42366000502.

It is a happy number.

205000663240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 205000663199 and 205000663208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4341952 + ... + 4388911.

It is an arithmetic number, because the mean of its divisors is an integer number (14438666340).

Almost surely, 2^205000663240 is an apocalyptic number.

205000663240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205000663240 is an abundant number, since it is smaller than the sum of its proper divisors (257036659640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205000663240 is a wasteful number, since it uses less digits than its factorization.

205000663240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8731461 (or 8731457 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 205000663240 its reverse (42366000502), we get a palindrome (247366663742).

The spelling of 205000663240 in words is "two hundred five billion, six hundred sixty-three thousand, two hundred forty".