20853225 has 18 divisors (see below), whose sum is σ = 37350846. Its totient is φ = 11121600.

The previous prime is 20853193. The next prime is 20853227. The reversal of 20853225 is 52235802.

It can be written as a sum of positive squares in 3 ways, for example, as 168921 + 20684304 = 411^2 + 4548^2 .

It is not a de Polignac number, because 20853225 - 2⁵ = 20853193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20853227) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 46116 + ... + 46565.

It is an arithmetic number, because the mean of its divisors is an integer number (2075047).

Almost surely, 2^20853225 is an apocalyptic number.

20853225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20853225 is a deficient number, since it is larger than the sum of its proper divisors (16497621).

20853225 is a wasteful number, since it uses less digits than its factorization.

20853225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92697 (or 92689 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 20853225 is about 4566.5331488997. The cubic root of 20853225 is about 275.2481506656.

The spelling of 20853225 in words is "twenty million, eight hundred fifty-three thousand, two hundred twenty-five".