20630853 has 6 divisors (see below), whose sum is σ = 29800134. Its totient is φ = 13753896.

The previous prime is 20630851. The next prime is 20630879. The reversal of 20630853 is 35803602.

20630853 is a `hidden beast` number, since 20 + 630 + 8 + 5 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20629764 + 1089 = 4542^2 + 33^2 .

It is not a de Polignac number, because 20630853 - 2¹ = 20630851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20630851) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1146150 + ... + 1146167.

It is an arithmetic number, because the mean of its divisors is an integer number (4966689).

Almost surely, 2^20630853 is an apocalyptic number.

It is an amenable number.

20630853 is a deficient number, since it is larger than the sum of its proper divisors (9169281).

20630853 is a wasteful number, since it uses less digits than its factorization.

20630853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292323 (or 2292320 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20630853 is about 4542.1198795276. The cubic root of 20630853 is about 274.2662666410.

The spelling of 20630853 in words is "twenty million, six hundred thirty thousand, eight hundred fifty-three".