2020909 has 16 divisors (see below), whose sum is σ = 2379456. Its totient is φ = 1696000.

The previous prime is 2020891. The next prime is 2020913. The reversal of 2020909 is 9090202.

It is a cyclic number.

It is not a de Polignac number, because 2020909 - 2⁵ = 2020877 is a prime.

2020909 is a modest number, since divided by 909 gives 202 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 2020909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020939) 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 in 15 ways as a sum of consecutive naturals, for example, 18834 + ... + 18940.

It is an arithmetic number, because the mean of its divisors is an integer number (148716).

2^2020909 is an apocalyptic number.

It is an amenable number.

2020909 is a deficient number, since it is larger than the sum of its proper divisors (358547).

2020909 is a wasteful number, since it uses less digits than its factorization.

2020909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 2020909 is about 1421.5867894715. The cubic root of 2020909 is about 126.4296452458.

Adding to 2020909 its reverse (9090202), we get a palindrome (11111111).

The spelling of 2020909 in words is "two million, twenty thousand, nine hundred nine".