20853133 has 16 divisors (see below), whose sum is σ = 24667776. Its totient is φ = 17256960.

The previous prime is 20853121. The next prime is 20853143. The reversal of 20853133 is 33135802.

It is not a de Polignac number, because 20853133 - 2⁹ = 20852621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20853098 and 20853107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20853113) 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 in 15 ways as a sum of consecutive naturals, for example, 32110 + ... + 32752.

It is an arithmetic number, because the mean of its divisors is an integer number (1541736).

Almost surely, 2^20853133 is an apocalyptic number.

It is an amenable number.

20853133 is a deficient number, since it is larger than the sum of its proper divisors (3814643).

20853133 is a wasteful number, since it uses less digits than its factorization.

20853133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20853133 is about 4566.5230756014. The cubic root of 20853133 is about 275.2477458862.

Adding to 20853133 its reverse (33135802), we get a palindrome (53988935).

It can be divided in two parts, 2085 and 3133, that multiplied together give a triangular number (6532305 = T₃₆₁₄).

The spelling of 20853133 in words is "twenty million, eight hundred fifty-three thousand, one hundred thirty-three".