201820200202 has 4 divisors (see below), whose sum is σ = 302730300306. Its totient is φ = 100910100100.

The previous prime is 201820200151. The next prime is 201820200203. The reversal of 201820200202 is 202002028102.

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

It can be written as a sum of positive squares in only one way, i.e., 192546317601 + 9273882601 = 438801^2 + 96301^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 201820200202.

It is not an unprimeable number, because it can be changed into a prime (201820200203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50455050049 + ... + 50455050052.

Almost surely, 2^201820200202 is an apocalyptic number.

201820200202 is a deficient number, since it is larger than the sum of its proper divisors (100910100104).

201820200202 is a wasteful number, since it uses less digits than its factorization.

201820200202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100910100103.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 201820200202 its reverse (202002028102), we get a palindrome (403822228304).

The spelling of 201820200202 in words is "two hundred one billion, eight hundred twenty million, two hundred thousand, two hundred two".