20652786 has 64 divisors (see below), whose sum is σ = 57231360. Its totient is φ = 5363280.

The previous prime is 20652763. The next prime is 20652799. The reversal of 20652786 is 68725602.

It is a self number, because there is not a number n which added to its sum of digits gives 20652786.

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 31 ways as a sum of consecutive naturals, for example, 1675 + ... + 6641.

It is an arithmetic number, because the mean of its divisors is an integer number (894240).

Almost surely, 2^20652786 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20652786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28615680).

20652786 is an abundant number, since it is smaller than the sum of its proper divisors (36578574).

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

20652786 is a wasteful number, since it uses less digits than its factorization.

20652786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4996 (or 4990 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 20652786 is about 4544.5336394398. The cubic root of 20652786 is about 274.3634245492.

It can be divided in two parts, 2065 and 2786, that added together give a triangular number (4851 = T₉₈).

The spelling of 20652786 in words is "twenty million, six hundred fifty-two thousand, seven hundred eighty-six".