20416325 has 6 divisors (see below), whose sum is σ = 25316274. Its totient is φ = 16333040.

The previous prime is 20416313. The next prime is 20416339. The reversal of 20416325 is 52361402.

It can be written as a sum of positive squares in 3 ways, for example, as 3094081 + 17322244 = 1759^2 + 4162^2 .

It is not a de Polignac number, because 20416325 - 2⁴ = 20416309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20416325.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 408302 + ... + 408351.

It is an arithmetic number, because the mean of its divisors is an integer number (4219379).

Almost surely, 2^20416325 is an apocalyptic number.

20416325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20416325 is a deficient number, since it is larger than the sum of its proper divisors (4899949).

20416325 is an equidigital number, since it uses as much as digits as its factorization.

20416325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816663 (or 816658 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20416325 is about 4518.4427627226. The cubic root of 20416325 is about 273.3123083504.

Adding to 20416325 its reverse (52361402), we get a palindrome (72777727).

The spelling of 20416325 in words is "twenty million, four hundred sixteen thousand, three hundred twenty-five".