205445320 has 32 divisors (see below), whose sum is σ = 463216320. Its totient is φ = 82006720.

The previous prime is 205445311. The next prime is 205445327. The reversal of 205445320 is 23544502.

205445320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (205445327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15015 + ... + 25225.

It is an arithmetic number, because the mean of its divisors is an integer number (14475510).

Almost surely, 2^205445320 is an apocalyptic number.

205445320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205445320 is an abundant number, since it is smaller than the sum of its proper divisors (257771000).

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

205445320 is a wasteful number, since it uses less digits than its factorization.

205445320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10725 (or 10721 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 205445320 is about 14333.3638759365. The cubic root of 205445320 is about 590.0634998206.

Adding to 205445320 its reverse (23544502), we get a palindrome (228989822).

It can be divided in two parts, 2054 and 45320, that added together give a palindrome (47374).

The spelling of 205445320 in words is "two hundred five million, four hundred forty-five thousand, three hundred twenty".