2020545 has 24 divisors (see below), whose sum is σ = 3634176. Its totient is φ = 1076976.

The previous prime is 2020537. The next prime is 2020547. The reversal of 2020545 is 5450202.

It is not a de Polignac number, because 2020545 - 2³ = 2020537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2020547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 384 + ... + 2046.

It is an arithmetic number, because the mean of its divisors is an integer number (151424).

2^2020545 is an apocalyptic number.

It is an amenable number.

2020545 is a deficient number, since it is larger than the sum of its proper divisors (1613631).

2020545 is an equidigital number, since it uses as much as digits as its factorization.

2020545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1683 (or 1671 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 2020545 is about 1421.4587577556. The cubic root of 2020545 is about 126.4220540819.

Adding to 2020545 its reverse (5450202), we get a palindrome (7470747).

The spelling of 2020545 in words is "two million, twenty thousand, five hundred forty-five".