2020509 has 6 divisors (see below), whose sum is σ = 2918526. Its totient is φ = 1347000.

The previous prime is 2020507. The next prime is 2020511. The reversal of 2020509 is 9050202.

It is an interprime number because it is at equal distance from previous prime (2020507) and next prime (2020511).

It can be written as a sum of positive squares in only one way, i.e., 1664100 + 356409 = 1290^2 + 597^2 .

It is not a de Polignac number, because 2020509 - 2¹ = 2020507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2020491 and 2020500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020507) 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 5 ways as a sum of consecutive naturals, for example, 112242 + ... + 112259.

It is an arithmetic number, because the mean of its divisors is an integer number (486421).

2^2020509 is an apocalyptic number.

It is an amenable number.

2020509 is a deficient number, since it is larger than the sum of its proper divisors (898017).

2020509 is a wasteful number, since it uses less digits than its factorization.

2020509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224507 (or 224504 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 2020509 is about 1421.4460946515. The cubic root of 2020509 is about 126.4213032579.

The spelling of 2020509 in words is "two million, twenty thousand, five hundred nine".