205107340 has 12 divisors (see below), whose sum is σ = 430725456. Its totient is φ = 82042928.

The previous prime is 205107323. The next prime is 205107341. The reversal of 205107340 is 43701502.

It is not an unprimeable number, because it can be changed into a prime (205107341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5127664 + ... + 5127703.

It is an arithmetic number, because the mean of its divisors is an integer number (35893788).

Almost surely, 2^205107340 is an apocalyptic number.

205107340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205107340 is an abundant number, since it is smaller than the sum of its proper divisors (225618116).

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

205107340 is a wasteful number, since it uses less digits than its factorization.

205107340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10255376 (or 10255374 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 205107340 is about 14321.5690481176. The cubic root of 205107340 is about 589.7397492432.

Adding to 205107340 its reverse (43701502), we get a palindrome (248808842).

The spelling of 205107340 in words is "two hundred five million, one hundred seven thousand, three hundred forty".