201838805 has 32 divisors (see below), whose sum is σ = 292757760. Its totient is φ = 130498560.

The previous prime is 201838783. The next prime is 201838837. The reversal of 201838805 is 508838102.

It is not a de Polignac number, because 201838805 - 2¹⁰ = 201837781 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 170315 + ... + 171495.

It is an arithmetic number, because the mean of its divisors is an integer number (9148680).

Almost surely, 2^201838805 is an apocalyptic number.

It is an amenable number.

201838805 is a deficient number, since it is larger than the sum of its proper divisors (90918955).

201838805 is a wasteful number, since it uses less digits than its factorization.

201838805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 201838805 is about 14206.9984514675. The cubic root of 201838805 is about 586.5903157282.

The spelling of 201838805 in words is "two hundred one million, eight hundred thirty-eight thousand, eight hundred five".