20366028 has 18 divisors (see below), whose sum is σ = 51480884. Its totient is φ = 6788664.

The previous prime is 20366011. The next prime is 20366029. The reversal of 20366028 is 82066302.

20366028 is a `hidden beast` number, since 20 + 36 + 602 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 20365992 and 20366010.

It is not an unprimeable number, because it can be changed into a prime (20366029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 282826 + ... + 282897.

Almost surely, 2^20366028 is an apocalyptic number.

It is an amenable number.

20366028 is an abundant number, since it is smaller than the sum of its proper divisors (31114856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20366028 is a wasteful number, since it uses less digits than its factorization.

20366028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565733 (or 565728 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 20366028 is about 4512.8735856436. The cubic root of 20366028 is about 273.0876826589.

The spelling of 20366028 in words is "twenty million, three hundred sixty-six thousand, twenty-eight".