20425297 has 4 divisors (see below), whose sum is σ = 20437300. Its totient is φ = 20413296.

The previous prime is 20425291. The next prime is 20425303. The reversal of 20425297 is 79252402.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (20425291) and next prime (20425303).

It can be written as a sum of positive squares in 2 ways, for example, as 9296401 + 11128896 = 3049^2 + 3336^2 .

It is a cyclic number.

It is not a de Polignac number, because 20425297 - 2³ = 20425289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20425291) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2922 + ... + 7027.

It is an arithmetic number, because the mean of its divisors is an integer number (5109325).

Almost surely, 2^20425297 is an apocalyptic number.

It is an amenable number.

20425297 is a deficient number, since it is larger than the sum of its proper divisors (12003).

20425297 is an equidigital number, since it uses as much as digits as its factorization.

20425297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12002.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 20425297 is about 4519.4354735962. The cubic root of 20425297 is about 273.3523383903.

Adding to 20425297 its reverse (79252402), we get a palindrome (99677699).

The spelling of 20425297 in words is "twenty million, four hundred twenty-five thousand, two hundred ninety-seven".