201820020001 has 8 divisors (see below), whose sum is σ = 202637635200. Its totient is φ = 201003141072.

The previous prime is 201820019993. The next prime is 201820020043. The reversal of 201820020001 is 100020028102.

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

It is a cyclic number.

It is not a de Polignac number, because 201820020001 - 2³ = 201820019993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201820020091) 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, 368616 + ... + 734518.

It is an arithmetic number, because the mean of its divisors is an integer number (25329704400).

Almost surely, 2^201820020001 is an apocalyptic number.

It is an amenable number.

201820020001 is a deficient number, since it is larger than the sum of its proper divisors (817615199).

201820020001 is a wasteful number, since it uses less digits than its factorization.

201820020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368135.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 201820020001 its reverse (100020028102), we get a palindrome (301840048103).

The spelling of 201820020001 in words is "two hundred one billion, eight hundred twenty million, twenty thousand, one".