20798785 has 24 divisors (see below), whose sum is σ = 30303936. Its totient is φ = 13638240.

The previous prime is 20798759. The next prime is 20798797. The reversal of 20798785 is 58789702.

It is a de Polignac number, because none of the positive numbers 2^k-20798785 is a prime.

It is a Duffinian 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 23 ways as a sum of consecutive naturals, for example, 3790 + ... + 7480.

It is an arithmetic number, because the mean of its divisors is an integer number (1262664).

Almost surely, 2^20798785 is an apocalyptic number.

It is an amenable number.

20798785 is a deficient number, since it is larger than the sum of its proper divisors (9505151).

20798785 is a wasteful number, since it uses less digits than its factorization.

20798785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3733 (or 3726 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 20798785 is about 4560.5684952646. The cubic root of 20798785 is about 275.0084184751.

The spelling of 20798785 in words is "twenty million, seven hundred ninety-eight thousand, seven hundred eighty-five".