20853305 has 16 divisors (see below), whose sum is σ = 28905984. Its totient is φ = 14273280.

The previous prime is 20853299. The next prime is 20853319. The reversal of 20853305 is 50335802.

It is not a de Polignac number, because 20853305 - 2¹⁰ = 20852281 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10217 + ... + 12086.

It is an arithmetic number, because the mean of its divisors is an integer number (1806624).

Almost surely, 2^20853305 is an apocalyptic number.

It is an amenable number.

20853305 is a deficient number, since it is larger than the sum of its proper divisors (8052679).

20853305 is a wasteful number, since it uses less digits than its factorization.

20853305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22336.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 20853305 is about 4566.5419082715. The cubic root of 20853305 is about 275.2485026467.

The spelling of 20853305 in words is "twenty million, eight hundred fifty-three thousand, three hundred five".