2003020549 has 4 divisors (see below), whose sum is σ = 2013188364. Its totient is φ = 1992852736.

The previous prime is 2003020511. The next prime is 2003020637. The reversal of 2003020549 is 9450203002.

It is a happy number.

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 1007618049 + 995402500 = 31743^2 + 31550^2 .

It is a cyclic number.

It is not a de Polignac number, because 2003020549 - 2⁷ = 2003020421 is a prime.

It is a super-2 number, since 2×2003020549² = 8024182639432522802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003020249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5083612 + ... + 5084005.

It is an arithmetic number, because the mean of its divisors is an integer number (503297091).

Almost surely, 2^2003020549 is an apocalyptic number.

It is an amenable number.

2003020549 is a deficient number, since it is larger than the sum of its proper divisors (10167815).

2003020549 is a wasteful number, since it uses less digits than its factorization.

2003020549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10167814.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 2003020549 is about 44755.1175733010. The cubic root of 2003020549 is about 1260.5550063970. Note that the first 3 decimals are identical.

The spelling of 2003020549 in words is "two billion, three million, twenty thousand, five hundred forty-nine".