20448191 has 2 divisors, whose sum is σ = 20448192. Its totient is φ = 20448190.

The previous prime is 20448179. The next prime is 20448203. The reversal of 20448191 is 19184402.

It is a balanced prime because it is at equal distance from previous prime (20448179) and next prime (20448203).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20448191 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20448101) 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, 10224095 + 10224096.

It is an arithmetic number, because the mean of its divisors is an integer number (10224096).

Almost surely, 2^20448191 is an apocalyptic number.

20448191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20448191 is an equidigital number, since it uses as much as digits as its factorization.

20448191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 20448191 is about 4521.9676027146. The cubic root of 20448191 is about 273.4544306099.

The spelling of 20448191 in words is "twenty million, four hundred forty-eight thousand, one hundred ninety-one".