20286128 has 10 divisors (see below), whose sum is σ = 39304404. Its totient is φ = 10143056.

The previous prime is 20286107. The next prime is 20286131. The reversal of 20286128 is 82168202.

It is a self number, because there is not a number n which added to its sum of digits gives 20286128.

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 as a sum of consecutive naturals, namely, 633926 + ... + 633957.

Almost surely, 2^20286128 is an apocalyptic number.

It is an amenable number.

20286128 is a deficient number, since it is larger than the sum of its proper divisors (19018276).

20286128 is a wasteful number, since it uses less digits than its factorization.

20286128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1267891 (or 1267885 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 20286128 is about 4504.0124333754. The cubic root of 20286128 is about 272.7300887521.

The spelling of 20286128 in words is "twenty million, two hundred eighty-six thousand, one hundred twenty-eight".