201820476755 has 8 divisors (see below), whose sum is σ = 242299309824. Its totient is φ = 161379889600.

The previous prime is 201820476749. The next prime is 201820476757. The reversal of 201820476755 is 557674028102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201820476755 - 2¹⁸ = 201820214611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201820476757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9549866 + ... + 9570975.

It is an arithmetic number, because the mean of its divisors is an integer number (30287413728).

Almost surely, 2^201820476755 is an apocalyptic number.

201820476755 is a deficient number, since it is larger than the sum of its proper divisors (40478833069).

201820476755 is a wasteful number, since it uses less digits than its factorization.

201820476755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19122957.

The product of its (nonzero) digits is 940800, while the sum is 47.

The spelling of 201820476755 in words is "two hundred one billion, eight hundred twenty million, four hundred seventy-six thousand, seven hundred fifty-five".