20003028 has 12 divisors (see below), whose sum is σ = 46673760. Its totient is φ = 6667672.

The previous prime is 20003023. The next prime is 20003047. The reversal of 20003028 is 82030002.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×20003028² = 800242258337568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20002998 and 20003016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003023) 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 3 ways as a sum of consecutive naturals, for example, 833448 + ... + 833471.

It is an arithmetic number, because the mean of its divisors is an integer number (3889480).

Almost surely, 2^20003028 is an apocalyptic number.

It is an amenable number.

20003028 is an abundant number, since it is smaller than the sum of its proper divisors (26670732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20003028 is a wasteful number, since it uses less digits than its factorization.

20003028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666926 (or 1666924 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 20003028 is about 4472.4744828786. The cubic root of 20003028 is about 271.4554597291.

The spelling of 20003028 in words is "twenty million, three thousand, twenty-eight".