20773885 has 12 divisors (see below), whose sum is σ = 27401724. Its totient is φ = 15107840.

The previous prime is 20773873. The next prime is 20773901. The reversal of 20773885 is 58837702.

It can be written as a sum of positive squares in 2 ways, for example, as 8305924 + 12467961 = 2882^2 + 3531^2 .

It is not a de Polignac number, because 20773885 - 2¹⁵ = 20741117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16564 + ... + 17773.

It is an arithmetic number, because the mean of its divisors is an integer number (2283477).

Almost surely, 2^20773885 is an apocalyptic number.

It is an amenable number.

20773885 is a deficient number, since it is larger than the sum of its proper divisors (6627839).

20773885 is a wasteful number, since it uses less digits than its factorization.

20773885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34364 (or 34353 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 20773885 is about 4557.8377549009. The cubic root of 20773885 is about 274.8986293039.

The spelling of 20773885 in words is "twenty million, seven hundred seventy-three thousand, eight hundred eighty-five".