20215028 has 12 divisors (see below), whose sum is σ = 35408100. Its totient is φ = 10098432.

The previous prime is 20215021. The next prime is 20215033. The reversal of 20215028 is 82051202.

It can be written as a sum of positive squares in 2 ways, for example, as 14348944 + 5866084 = 3788^2 + 2422^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20215021) 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 3 ways as a sum of consecutive naturals, for example, 6500 + ... + 9092.

It is an arithmetic number, because the mean of its divisors is an integer number (2950675).

Almost surely, 2^20215028 is an apocalyptic number.

It is an amenable number.

20215028 is a deficient number, since it is larger than the sum of its proper divisors (15193072).

20215028 is a wasteful number, since it uses less digits than its factorization.

20215028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4546 (or 4544 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 20215028 is about 4496.1125430754. The cubic root of 20215028 is about 272.4110890250.

The spelling of 20215028 in words is "twenty million, two hundred fifteen thousand, twenty-eight".