20853361 has 2 divisors, whose sum is σ = 20853362. Its totient is φ = 20853360.

The previous prime is 20853319. The next prime is 20853377. The reversal of 20853361 is 16335802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12645136 + 8208225 = 3556^2 + 2865^2 .

It is a cyclic number.

It is not a de Polignac number, because 20853361 - 2⁹ = 20852849 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20853061) 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, 10426680 + 10426681.

It is an arithmetic number, because the mean of its divisors is an integer number (10426681).

Almost surely, 2^20853361 is an apocalyptic number.

It is an amenable number.

20853361 is a deficient number, since it is larger than the sum of its proper divisors (1).

20853361 is an equidigital number, since it uses as much as digits as its factorization.

20853361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 20853361 is about 4566.5480398218. The cubic root of 20853361 is about 275.2487490329.

The spelling of 20853361 in words is "twenty million, eight hundred fifty-three thousand, three hundred sixty-one".