20566350 has 72 divisors (see below), whose sum is σ = 63158160. Its totient is φ = 4700160.

The previous prime is 20566331. The next prime is 20566367. The reversal of 20566350 is 5366502.

20566350 is a `hidden beast` number, since 20 + 5 + 6 + 635 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 115 + ... + 6414.

Almost surely, 2^20566350 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20566350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31579080).

20566350 is an abundant number, since it is smaller than the sum of its proper divisors (42591810).

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

20566350 is a wasteful number, since it uses less digits than its factorization.

20566350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6554 (or 6546 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 20566350 is about 4535.0137816770. The cubic root of 20566350 is about 273.9801342444.

The spelling of 20566350 in words is "twenty million, five hundred sixty-six thousand, three hundred fifty".