205240030 has 8 divisors (see below), whose sum is σ = 369432072. Its totient is φ = 82096008.

The previous prime is 205239967. The next prime is 205240037. The reversal of 205240030 is 30042502.

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

It is a junction number, because it is equal to n+sod(n) for n = 205239986 and 205240013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205240037) 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, 10261992 + ... + 10262011.

It is an arithmetic number, because the mean of its divisors is an integer number (46179009).

Almost surely, 2^205240030 is an apocalyptic number.

205240030 is a deficient number, since it is larger than the sum of its proper divisors (164192042).

205240030 is a wasteful number, since it uses less digits than its factorization.

205240030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20524010.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 205240030 is about 14326.2008222697. The cubic root of 205240030 is about 589.8668951867.

Adding to 205240030 its reverse (30042502), we get a palindrome (235282532).

The spelling of 205240030 in words is "two hundred five million, two hundred forty thousand, thirty".