209030418 has 12 divisors (see below), whose sum is σ = 452899278. Its totient is φ = 69676800.

The previous prime is 209030407. The next prime is 209030431. The reversal of 209030418 is 814030902.

It can be written as a sum of positive squares in only one way, i.e., 161874729 + 47155689 = 12723^2 + 6867^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 209030391 and 209030400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5806383 + ... + 5806418.

Almost surely, 2^209030418 is an apocalyptic number.

209030418 is an abundant number, since it is smaller than the sum of its proper divisors (243868860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

209030418 is a wasteful number, since it uses less digits than its factorization.

209030418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11612809 (or 11612806 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 209030418 is about 14457.8842850536. The cubic root of 209030418 is about 593.4760028784.

The spelling of 209030418 in words is "two hundred nine million, thirty thousand, four hundred eighteen".