205021330 has 8 divisors (see below), whose sum is σ = 369038412. Its totient is φ = 82008528.

The previous prime is 205021301. The next prime is 205021337. The reversal of 205021330 is 33120502.

It can be written as a sum of positive squares in 2 ways, for example, as 172108161 + 32913169 = 13119^2 + 5737^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (205021337) 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, 10251057 + ... + 10251076.

Almost surely, 2^205021330 is an apocalyptic number.

205021330 is a deficient number, since it is larger than the sum of its proper divisors (164017082).

205021330 is a wasteful number, since it uses less digits than its factorization.

205021330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20502140.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 205021330 is about 14318.5659198119. The cubic root of 205021330 is about 589.6573036197.

Adding to 205021330 its reverse (33120502), we get a palindrome (238141832).

The spelling of 205021330 in words is "two hundred five million, twenty-one thousand, three hundred thirty".