20960685 has 24 divisors (see below), whose sum is σ = 37316760. Its totient is φ = 10876032.

The previous prime is 20960669. The next prime is 20960689. The reversal of 20960685 is 58606902.

It can be written as a sum of positive squares in 4 ways, for example, as 1855044 + 19105641 = 1362^2 + 4371^2 .

It is not a de Polignac number, because 20960685 - 2⁴ = 20960669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20960689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4630 + ... + 7959.

It is an arithmetic number, because the mean of its divisors is an integer number (1554865).

Almost surely, 2^20960685 is an apocalyptic number.

It is an amenable number.

20960685 is a deficient number, since it is larger than the sum of its proper divisors (16356075).

20960685 is a wasteful number, since it uses less digits than its factorization.

20960685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12637 (or 12634 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 20960685 is about 4578.2840672025. The cubic root of 20960685 is about 275.7201400776.

The spelling of 20960685 in words is "twenty million, nine hundred sixty thousand, six hundred eighty-five".