209395830530 has 8 divisors (see below), whose sum is σ = 376912494972. Its totient is φ = 83758332208.

The previous prime is 209395830529. The next prime is 209395830533. The reversal of 209395830530 is 35038593902.

It can be written as a sum of positive squares in 2 ways, for example, as 207033190081 + 2362640449 = 455009^2 + 48607^2 .

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

It is a super-2 number, since 2×209395830530² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (209395830533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10469791517 + ... + 10469791536.

Almost surely, 2^209395830530 is an apocalyptic number.

209395830530 is a deficient number, since it is larger than the sum of its proper divisors (167516664442).

209395830530 is a wasteful number, since it uses less digits than its factorization.

209395830530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20939583060.

The product of its (nonzero) digits is 874800, while the sum is 47.

The spelling of 209395830530 in words is "two hundred nine billion, three hundred ninety-five million, eight hundred thirty thousand, five hundred thirty".