2001420205 has 4 divisors (see below), whose sum is σ = 2401704252. Its totient is φ = 1601136160.

The previous prime is 2001420203. The next prime is 2001420209. The reversal of 2001420205 is 5020241002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1513054404 + 488365801 = 38898^2 + 22099^2 .

It is not a de Polignac number, because 2001420205 - 2¹ = 2001420203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001420203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200142016 + ... + 200142025.

It is an arithmetic number, because the mean of its divisors is an integer number (600426063).

Almost surely, 2^2001420205 is an apocalyptic number.

It is an amenable number.

2001420205 is a deficient number, since it is larger than the sum of its proper divisors (400284047).

2001420205 is an equidigital number, since it uses as much as digits as its factorization.

2001420205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400284046.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 2001420205 is about 44737.2351067877. The cubic root of 2001420205 is about 1260.2192036952.

Adding to 2001420205 its reverse (5020241002), we get a palindrome (7021661207).

The spelling of 2001420205 in words is "two billion, one million, four hundred twenty thousand, two hundred five".