20432225 has 24 divisors (see below), whose sum is σ = 27855360. Its totient is φ = 14744000.

The previous prime is 20432183. The next prime is 20432233. The reversal of 20432225 is 52223402.

It is not a de Polignac number, because 20432225 - 2⁶ = 20432161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20432197 and 20432206.

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 23 ways as a sum of consecutive naturals, for example, 52331 + ... + 52719.

It is an arithmetic number, because the mean of its divisors is an integer number (1160640).

Almost surely, 2^20432225 is an apocalyptic number.

20432225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20432225 is a deficient number, since it is larger than the sum of its proper divisors (7423135).

20432225 is a wasteful number, since it uses less digits than its factorization.

20432225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601 (or 596 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 20432225 is about 4520.2018760228. The cubic root of 20432225 is about 273.3832407713.

Adding to 20432225 its reverse (52223402), we get a palindrome (72655627).

The spelling of 20432225 in words is "twenty million, four hundred thirty-two thousand, two hundred twenty-five".