20448287 has 2 divisors, whose sum is σ = 20448288. Its totient is φ = 20448286.

The previous prime is 20448271. The next prime is 20448293. The reversal of 20448287 is 78284402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20448287 - 2⁴ = 20448271 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 (20448227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10224143 + 10224144.

It is an arithmetic number, because the mean of its divisors is an integer number (10224144).

Almost surely, 2^20448287 is an apocalyptic number.

20448287 is a deficient number, since it is larger than the sum of its proper divisors (1).

20448287 is an equidigital number, since it uses as much as digits as its factorization.

20448287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 20448287 is about 4521.9782175504. The cubic root of 20448287 is about 273.4548585464.

The spelling of 20448287 in words is "twenty million, four hundred forty-eight thousand, two hundred eighty-seven".