21448127 has 2 divisors, whose sum is σ = 21448128. Its totient is φ = 21448126.

The previous prime is 21448079. The next prime is 21448129. The reversal of 21448127 is 72184412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21448127 - 2⁸ = 21447871 is a prime.

Together with 21448129, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21448127.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21448129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10724063 + 10724064.

It is an arithmetic number, because the mean of its divisors is an integer number (10724064).

Almost surely, 2^21448127 is an apocalyptic number.

21448127 is a deficient number, since it is larger than the sum of its proper divisors (1).

21448127 is an equidigital number, since it uses as much as digits as its factorization.

21448127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3584, while the sum is 29.

The square root of 21448127 is about 4631.2122603051. The cubic root of 21448127 is about 277.8410793985.

The spelling of 21448127 in words is "twenty-one million, four hundred forty-eight thousand, one hundred twenty-seven".