206530004 has 24 divisors (see below), whose sum is σ = 372583008. Its totient is φ = 100098720.

The previous prime is 206530003. The next prime is 206530013. The reversal of 206530004 is 400035602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206530003) 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, 39419 + ... + 44349.

It is an arithmetic number, because the mean of its divisors is an integer number (15524292).

Almost surely, 2^206530004 is an apocalyptic number.

It is an amenable number.

206530004 is a deficient number, since it is larger than the sum of its proper divisors (166053004).

206530004 is a wasteful number, since it uses less digits than its factorization.

206530004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5255 (or 5253 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 206530004 is about 14371.1517979597. The cubic root of 206530004 is about 591.1001249468.

Adding to 206530004 its reverse (400035602), we get a palindrome (606565606).

The spelling of 206530004 in words is "two hundred six million, five hundred thirty thousand, four".