21252383 has 2 divisors, whose sum is σ = 21252384. Its totient is φ = 21252382.

The previous prime is 21252377. The next prime is 21252401. The reversal of 21252383 is 38325212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21252383 - 2⁴ = 21252367 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21252323) 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, 10626191 + 10626192.

It is an arithmetic number, because the mean of its divisors is an integer number (10626192).

Almost surely, 2^21252383 is an apocalyptic number.

21252383 is a deficient number, since it is larger than the sum of its proper divisors (1).

21252383 is an equidigital number, since it uses as much as digits as its factorization.

21252383 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 26.

The square root of 21252383 is about 4610.0306940410. The cubic root of 21252383 is about 276.9932661806.

Adding to 21252383 its reverse (38325212), we get a palindrome (59577595).

The spelling of 21252383 in words is "twenty-one million, two hundred fifty-two thousand, three hundred eighty-three".