200018940 has 96 divisors (see below), whose sum is σ = 646942464. Its totient is φ = 45634560.

The previous prime is 200018849. The next prime is 200018953. The reversal of 200018940 is 49810002.

It is a self number, because there is not a number n which added to its sum of digits gives 200018940.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 2307 + ... + 20133.

It is an arithmetic number, because the mean of its divisors is an integer number (6738984).

Almost surely, 2^200018940 is an apocalyptic number.

200018940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 200018940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323471232).

200018940 is an abundant number, since it is smaller than the sum of its proper divisors (446923524).

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

200018940 is a wasteful number, since it uses less digits than its factorization.

200018940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17867 (or 17865 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 200018940 is about 14142.8052380000. The cubic root of 200018940 is about 584.8220073585.

Adding to 200018940 its reverse (49810002), we get a palindrome (249828942).

The spelling of 200018940 in words is "two hundred million, eighteen thousand, nine hundred forty".