200918 has 4 divisors (see below), whose sum is σ = 301380. Its totient is φ = 100458.

The previous prime is 200909. The next prime is 200927. The reversal of 200918 is 819002.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (200909) and next prime (200927).

It is an Ulam number.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 200918.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 200918.

It is an unprimeable number.

200918 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50228 + ... + 50231.

It is an arithmetic number, because the mean of its divisors is an integer number (75345).

2²⁰⁰⁹¹⁸ is an apocalyptic number.

200918 is a deficient number, since it is larger than the sum of its proper divisors (100462).

200918 is a wasteful number, since it uses less digits than its factorization.

200918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100461.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 200918 is about 448.2387756542. The cubic root of 200918 is about 58.5696931584.

The spelling of 200918 in words is "two hundred thousand, nine hundred eighteen".