20673028 has 12 divisors (see below), whose sum is σ = 36551452. Its totient is φ = 10229760.

The previous prime is 20673019. The next prime is 20673077. The reversal of 20673028 is 82037602.

It can be written as a sum of positive squares in 2 ways, for example, as 10227204 + 10445824 = 3198^2 + 3232^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20672987 and 20673005.

It is an unprimeable number.

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, 26253 + ... + 27028.

Almost surely, 2^20673028 is an apocalyptic number.

It is an amenable number.

20673028 is a deficient number, since it is larger than the sum of its proper divisors (15878424).

20673028 is a wasteful number, since it uses less digits than its factorization.

20673028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53382 (or 53380 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20673028 is about 4546.7601652165. The cubic root of 20673028 is about 274.4530307171.

The spelling of 20673028 in words is "twenty million, six hundred seventy-three thousand, twenty-eight".