20853356 has 24 divisors (see below), whose sum is σ = 38782800. Its totient is φ = 9777152.

The previous prime is 20853319. The next prime is 20853361. The reversal of 20853356 is 65335802.

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 7 ways as a sum of consecutive naturals, for example, 30191 + ... + 30873.

It is an arithmetic number, because the mean of its divisors is an integer number (1615950).

Almost surely, 2^20853356 is an apocalyptic number.

It is an amenable number.

20853356 is a deficient number, since it is larger than the sum of its proper divisors (17929444).

20853356 is a wasteful number, since it uses less digits than its factorization.

20853356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153 (or 1151 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 20853356 is about 4566.5474923623. The cubic root of 20853356 is about 275.2487270342.

The spelling of 20853356 in words is "twenty million, eight hundred fifty-three thousand, three hundred fifty-six".