20245259 has 2 divisors, whose sum is σ = 20245260. Its totient is φ = 20245258.

The previous prime is 20245237. The next prime is 20245261. The reversal of 20245259 is 95254202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20245259 - 2¹² = 20241163 is a prime.

Together with 20245261, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20245289) 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 as a sum of consecutive naturals, namely, 10122629 + 10122630.

It is an arithmetic number, because the mean of its divisors is an integer number (10122630).

Almost surely, 2^20245259 is an apocalyptic number.

20245259 is a deficient number, since it is larger than the sum of its proper divisors (1).

20245259 is an equidigital number, since it uses as much as digits as its factorization.

20245259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 20245259 is about 4499.4731913859. The cubic root of 20245259 is about 272.5468157368.

The spelling of 20245259 in words is "twenty million, two hundred forty-five thousand, two hundred fifty-nine".