20748853 has 2 divisors, whose sum is σ = 20748854. Its totient is φ = 20748852.

The previous prime is 20748841. The next prime is 20748877. The reversal of 20748853 is 35884702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20729809 + 19044 = 4553^2 + 138^2 .

It is a cyclic number.

It is not a de Polignac number, because 20748853 - 2⁵ = 20748821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20748803) 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 as a sum of consecutive naturals, namely, 10374426 + 10374427.

It is an arithmetic number, because the mean of its divisors is an integer number (10374427).

Almost surely, 2^20748853 is an apocalyptic number.

It is an amenable number.

20748853 is a deficient number, since it is larger than the sum of its proper divisors (1).

20748853 is an equidigital number, since it uses as much as digits as its factorization.

20748853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 20748853 is about 4555.0908882261. The cubic root of 20748853 is about 274.7881696530.

The spelling of 20748853 in words is "twenty million, seven hundred forty-eight thousand, eight hundred fifty-three".