20448319 has 2 divisors, whose sum is σ = 20448320. Its totient is φ = 20448318.

The previous prime is 20448317. The next prime is 20448341. The reversal of 20448319 is 91384402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20448319 - 2¹ = 20448317 is a prime.

It is a super-2 number, since 2×20448319² = 836267499851522, which contains 22 as substring.

Together with 20448317, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20448317) by changing a digit.

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 as a sum of consecutive naturals, namely, 10224159 + 10224160.

It is an arithmetic number, because the mean of its divisors is an integer number (10224160).

Almost surely, 2^20448319 is an apocalyptic number.

20448319 is a deficient number, since it is larger than the sum of its proper divisors (1).

20448319 is an equidigital number, since it uses as much as digits as its factorization.

20448319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 20448319 is about 4521.9817558234. The cubic root of 20448319 is about 273.4550011917.

The spelling of 20448319 in words is "twenty million, four hundred forty-eight thousand, three hundred nineteen".