20286486 has 48 divisors (see below), whose sum is σ = 49617360. Its totient is φ = 5933760.

The previous prime is 20286473. The next prime is 20286503. The reversal of 20286486 is 68468202.

20286486 is a `hidden beast` number, since 2 + 0 + 2 + 8 + 648 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 20286486.

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 23 ways as a sum of consecutive naturals, for example, 3976 + ... + 7508.

It is an arithmetic number, because the mean of its divisors is an integer number (1033695).

Almost surely, 2^20286486 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20286486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24808680).

20286486 is an abundant number, since it is smaller than the sum of its proper divisors (29330874).

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

20286486 is a wasteful number, since it uses less digits than its factorization.

20286486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581 (or 3578 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 20286486 is about 4504.0521755415. The cubic root of 20286486 is about 272.7316930799.

The spelling of 20286486 in words is "twenty million, two hundred eighty-six thousand, four hundred eighty-six".