200009818 has 4 divisors (see below), whose sum is σ = 300014730. Its totient is φ = 100004908.

The previous prime is 200009731. The next prime is 200009819. The reversal of 200009818 is 818900002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 818900002 = 2 ⋅409450001.

It can be written as a sum of positive squares in only one way, i.e., 151609969 + 48399849 = 12313^2 + 6957^2 .

It is not an unprimeable number, because it can be changed into a prime (200009819) 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 as a sum of consecutive naturals, namely, 50002453 + ... + 50002456.

Almost surely, 2^200009818 is an apocalyptic number.

200009818 is a deficient number, since it is larger than the sum of its proper divisors (100004912).

200009818 is a wasteful number, since it uses less digits than its factorization.

200009818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100004911.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 200009818 is about 14142.4827381899. The cubic root of 200009818 is about 584.8131168214.

The spelling of 200009818 in words is "two hundred million, nine thousand, eight hundred eighteen".