20570128 has 10 divisors (see below), whose sum is σ = 39854654. Its totient is φ = 10285056.

The previous prime is 20570117. The next prime is 20570167. The reversal of 20570128 is 82107502.

It can be written as a sum of positive squares in only one way, i.e., 17707264 + 2862864 = 4208^2 + 1692^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642801 + ... + 642832.

Almost surely, 2^20570128 is an apocalyptic number.

It is an amenable number.

20570128 is a deficient number, since it is larger than the sum of its proper divisors (19284526).

20570128 is a wasteful number, since it uses less digits than its factorization.

20570128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285641 (or 1285635 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 20570128 is about 4535.4302993211. The cubic root of 20570128 is about 273.9969097632.

The spelling of 20570128 in words is "twenty million, five hundred seventy thousand, one hundred twenty-eight".