20874853 has 2 divisors, whose sum is σ = 20874854. Its totient is φ = 20874852.

The previous prime is 20874851. The next prime is 20874883. The reversal of 20874853 is 35847802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19918369 + 956484 = 4463^2 + 978^2 .

It is a cyclic number.

It is not a de Polignac number, because 20874853 - 2¹ = 20874851 is a prime.

Together with 20874851, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20874851) 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, 10437426 + 10437427.

It is an arithmetic number, because the mean of its divisors is an integer number (10437427).

Almost surely, 2^20874853 is an apocalyptic number.

It is an amenable number.

20874853 is a deficient number, since it is larger than the sum of its proper divisors (1).

20874853 is an equidigital number, since it uses as much as digits as its factorization.

20874853 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 20874853 is about 4568.9006336317. The cubic root of 20874853 is about 275.3432760016.

The spelling of 20874853 in words is "twenty million, eight hundred seventy-four thousand, eight hundred fifty-three".