20306853 has 24 divisors (see below), whose sum is σ = 33878208. Its totient is φ = 11480832.

The previous prime is 20306837. The next prime is 20306887. The reversal of 20306853 is 35860302.

It is not a de Polignac number, because 20306853 - 2⁴ = 20306837 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20306813) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4450 + ... + 7772.

It is an arithmetic number, because the mean of its divisors is an integer number (1411592).

Almost surely, 2^20306853 is an apocalyptic number.

It is an amenable number.

20306853 is a deficient number, since it is larger than the sum of its proper divisors (13571355).

20306853 is a wasteful number, since it uses less digits than its factorization.

20306853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3433 (or 3430 counting only the distinct ones).

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

The square root of 20306853 is about 4506.3125723811. The cubic root of 20306853 is about 272.8229339270.

The spelling of 20306853 in words is "twenty million, three hundred six thousand, eight hundred fifty-three".