21382103 has 2 divisors, whose sum is σ = 21382104. Its totient is φ = 21382102.

The previous prime is 21382099. The next prime is 21382121. The reversal of 21382103 is 30128312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21382103 - 2² = 21382099 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 (21382303) 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, 10691051 + 10691052.

It is an arithmetic number, because the mean of its divisors is an integer number (10691052).

Almost surely, 2^21382103 is an apocalyptic number.

21382103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21382103 is an equidigital number, since it uses as much as digits as its factorization.

21382103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 21382103 is about 4624.0786109235. The cubic root of 21382103 is about 277.5556926340. Note that the first 3 decimals are identical.

The spelling of 21382103 in words is "twenty-one million, three hundred eighty-two thousand, one hundred three".