20108425 has 6 divisors (see below), whose sum is σ = 24934478. Its totient is φ = 16086720.

The previous prime is 20108419. The next prime is 20108437. The reversal of 20108425 is 52480102.

It can be written as a sum of positive squares in 3 ways, for example, as 6411024 + 13697401 = 2532^2 + 3701^2 .

It is not a de Polignac number, because 20108425 - 2¹¹ = 20106377 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20108396 and 20108405.

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 5 ways as a sum of consecutive naturals, for example, 402144 + ... + 402193.

Almost surely, 2^20108425 is an apocalyptic number.

20108425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20108425 is a deficient number, since it is larger than the sum of its proper divisors (4826053).

20108425 is an equidigital number, since it uses as much as digits as its factorization.

20108425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804347 (or 804342 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 20108425 is about 4484.2418534241. The cubic root of 20108425 is about 271.9313957963.

Adding to 20108425 its reverse (52480102), we get a palindrome (72588527).

The spelling of 20108425 in words is "twenty million, one hundred eight thousand, four hundred twenty-five".