20495225 has 12 divisors (see below), whose sum is σ = 26102124. Its totient is φ = 15952320.

The previous prime is 20495221. The next prime is 20495239. The reversal of 20495225 is 52259402.

It can be written as a sum of positive squares in 6 ways, for example, as 1590121 + 18905104 = 1261^2 + 4348^2 .

It is not a de Polignac number, because 20495225 - 2² = 20495221 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20495221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10154 + ... + 12003.

It is an arithmetic number, because the mean of its divisors is an integer number (2175177).

Almost surely, 2^20495225 is an apocalyptic number.

20495225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20495225 is a deficient number, since it is larger than the sum of its proper divisors (5606899).

20495225 is a wasteful number, since it uses less digits than its factorization.

20495225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22204 (or 22199 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 20495225 is about 4527.1652278219. The cubic root of 20495225 is about 273.6639325492.

The spelling of 20495225 in words is "twenty million, four hundred ninety-five thousand, two hundred twenty-five".