20853357 has 16 divisors (see below), whose sum is σ = 31850112. Its totient is φ = 11888640.

The previous prime is 20853319. The next prime is 20853361. The reversal of 20853357 is 75335802.

It is not a de Polignac number, because 20853357 - 2⁶ = 20853293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20853377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11257 + ... + 12977.

It is an arithmetic number, because the mean of its divisors is an integer number (1990632).

Almost surely, 2^20853357 is an apocalyptic number.

It is an amenable number.

20853357 is a deficient number, since it is larger than the sum of its proper divisors (10996755).

20853357 is a wasteful number, since it uses less digits than its factorization.

20853357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2308.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 20853357 is about 4566.5476018542. The cubic root of 20853357 is about 275.2487314339.

The spelling of 20853357 in words is "twenty million, eight hundred fifty-three thousand, three hundred fifty-seven".