20825105 has 8 divisors (see below), whose sum is σ = 28560192. Its totient is φ = 14280048.

The previous prime is 20825099. The next prime is 20825177. The reversal of 20825105 is 50152802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20825105 - 2⁶ = 20825041 is a prime.

It is a super-2 number, since 2×20825105² = 867369996522050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297467 + ... + 297536.

It is an arithmetic number, because the mean of its divisors is an integer number (3570024).

Almost surely, 2^20825105 is an apocalyptic number.

It is an amenable number.

20825105 is a deficient number, since it is larger than the sum of its proper divisors (7735087).

20825105 is an equidigital number, since it uses as much as digits as its factorization.

20825105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595015.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 20825105 is about 4563.4531881022. The cubic root of 20825105 is about 275.1243734935.

Adding to 20825105 its reverse (50152802), we get a palindrome (70977907).

The spelling of 20825105 in words is "twenty million, eight hundred twenty-five thousand, one hundred five".