20995028 has 12 divisors (see below), whose sum is σ = 36847860. Its totient is φ = 10467072.

The previous prime is 20994989. The next prime is 20995031. The reversal of 20995028 is 82059902.

It can be written as a sum of positive squares in 2 ways, for example, as 6646084 + 14348944 = 2578^2 + 3788^2 .

It is a congruent number.

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, 6023 + ... + 8846.

It is an arithmetic number, because the mean of its divisors is an integer number (3070655).

Almost surely, 2^20995028 is an apocalyptic number.

It is an amenable number.

20995028 is a deficient number, since it is larger than the sum of its proper divisors (15852832).

20995028 is a wasteful number, since it uses less digits than its factorization.

20995028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15226 (or 15224 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 20995028 is about 4582.0331731667. The cubic root of 20995028 is about 275.8706423147.

The spelling of 20995028 in words is "twenty million, nine hundred ninety-five thousand, twenty-eight".