201820604 has 6 divisors (see below), whose sum is σ = 353186064. Its totient is φ = 100910300.

The previous prime is 201820547. The next prime is 201820609. The reversal of 201820604 is 406028102.

It is a self number, because there is not a number n which added to its sum of digits gives 201820604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201820609) by changing a digit.

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 as a sum of consecutive naturals, namely, 25227572 + ... + 25227579.

It is an arithmetic number, because the mean of its divisors is an integer number (58864344).

Almost surely, 2^201820604 is an apocalyptic number.

It is an amenable number.

201820604 is a deficient number, since it is larger than the sum of its proper divisors (151365460).

201820604 is a wasteful number, since it uses less digits than its factorization.

201820604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50455155 (or 50455153 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 201820604 is about 14206.3578724457. The cubic root of 201820604 is about 586.5726830909.

Adding to 201820604 its reverse (406028102), we get a palindrome (607848706).

It can be divided in two parts, 2018 and 20604, that added together give a palindrome (22622).

The spelling of 201820604 in words is "two hundred one million, eight hundred twenty thousand, six hundred four".