205304424340 has 24 divisors (see below), whose sum is σ = 431779942440. Its totient is φ = 81999740928.

The previous prime is 205304424293. The next prime is 205304424343. The reversal of 205304424340 is 43424403502.

It can be written as a sum of positive squares in 4 ways, for example, as 2215396624 + 203089027716 = 47068^2 + 450654^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205304424343) 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, 7613005 + ... + 7639924.

It is an arithmetic number, because the mean of its divisors is an integer number (17990830935).

Almost surely, 2^205304424340 is an apocalyptic number.

205304424340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205304424340 is an abundant number, since it is smaller than the sum of its proper divisors (226475518100).

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

205304424340 is a wasteful number, since it uses less digits than its factorization.

205304424340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15253611 (or 15253609 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 31.

Adding to 205304424340 its reverse (43424403502), we get a palindrome (248728827842).

The spelling of 205304424340 in words is "two hundred five billion, three hundred four million, four hundred twenty-four thousand, three hundred forty".