21132383 has 2 divisors, whose sum is σ = 21132384. Its totient is φ = 21132382.

The previous prime is 21132341. The next prime is 21132481. The reversal of 21132383 is 38323112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21132383 - 2⁸ = 21132127 is a prime.

It is a super-2 number, since 2×21132383² = 893155222517378, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21132983) 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, 10566191 + 10566192.

It is an arithmetic number, because the mean of its divisors is an integer number (10566192).

Almost surely, 2^21132383 is an apocalyptic number.

21132383 is a deficient number, since it is larger than the sum of its proper divisors (1).

21132383 is an equidigital number, since it uses as much as digits as its factorization.

21132383 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 23.

The square root of 21132383 is about 4596.9971720679. The cubic root of 21132383 is about 276.4709412284.

Adding to 21132383 its reverse (38323112), we get a palindrome (59455495).

The spelling of 21132383 in words is "twenty-one million, one hundred thirty-two thousand, three hundred eighty-three".