20544225 has 48 divisors (see below), whose sum is σ = 38539200. Its totient is φ = 9573120.

The previous prime is 20544203. The next prime is 20544233. The reversal of 20544225 is 52244502.

It is a happy number.

It is not a de Polignac number, because 20544225 - 2⁵ = 20544193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20544195 and 20544204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17971 + ... + 19079.

It is an arithmetic number, because the mean of its divisors is an integer number (802900).

Almost surely, 2^20544225 is an apocalyptic number.

20544225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20544225 is a deficient number, since it is larger than the sum of its proper divisors (17994975).

20544225 is a wasteful number, since it uses less digits than its factorization.

20544225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154 (or 1149 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 20544225 is about 4532.5737721520. The cubic root of 20544225 is about 273.8818509563.

Adding to 20544225 its reverse (52244502), we get a palindrome (72788727).

The spelling of 20544225 in words is "twenty million, five hundred forty-four thousand, two hundred twenty-five".