209942342930 has 8 divisors (see below), whose sum is σ = 377896217292. Its totient is φ = 83976937168.

The previous prime is 209942342923. The next prime is 209942342941. The reversal of 209942342930 is 39243249902.

It can be written as a sum of positive squares in 2 ways, for example, as 205964391889 + 3977951041 = 453833^2 + 63071^2 .

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

It is an unprimeable number.

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, 10497117137 + ... + 10497117156.

Almost surely, 2^209942342930 is an apocalyptic number.

209942342930 is a deficient number, since it is larger than the sum of its proper divisors (167953874362).

209942342930 is a wasteful number, since it uses less digits than its factorization.

209942342930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20994234300.

The product of its (nonzero) digits is 839808, while the sum is 47.

The spelling of 209942342930 in words is "two hundred nine billion, nine hundred forty-two million, three hundred forty-two thousand, nine hundred thirty".