20303425 has 6 divisors (see below), whose sum is σ = 25176278. Its totient is φ = 16242720.

The previous prime is 20303351. The next prime is 20303431. The reversal of 20303425 is 52430302.

It can be written as a sum of positive squares in 3 ways, for example, as 908209 + 19395216 = 953^2 + 4404^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20303425 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 406044 + ... + 406093.

Almost surely, 2^20303425 is an apocalyptic number.

20303425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20303425 is a deficient number, since it is larger than the sum of its proper divisors (4872853).

20303425 is an equidigital number, since it uses as much as digits as its factorization.

20303425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812147 (or 812142 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 20303425 is about 4505.9322009990. The cubic root of 20303425 is about 272.8075813160.

Adding to 20303425 its reverse (52430302), we get a palindrome (72733727).

The spelling of 20303425 in words is "twenty million, three hundred three thousand, four hundred twenty-five".