21884383 has 2 divisors, whose sum is σ = 21884384. Its totient is φ = 21884382.

The previous prime is 21884351. The next prime is 21884399. The reversal of 21884383 is 38348812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21884383 - 2⁵ = 21884351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21884323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10942191 + 10942192.

It is an arithmetic number, because the mean of its divisors is an integer number (10942192).

Almost surely, 2^21884383 is an apocalyptic number.

21884383 is a deficient number, since it is larger than the sum of its proper divisors (1).

21884383 is an equidigital number, since it uses as much as digits as its factorization.

21884383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36864, while the sum is 37.

The square root of 21884383 is about 4678.0747108185. The cubic root of 21884383 is about 279.7122170742.

The spelling of 21884383 in words is "twenty-one million, eight hundred eighty-four thousand, three hundred eighty-three".