21883439 has 2 divisors, whose sum is σ = 21883440. Its totient is φ = 21883438.

The previous prime is 21883423. The next prime is 21883447. The reversal of 21883439 is 93438812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21883439 - 2⁴ = 21883423 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 (21883039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10941719 + 10941720.

It is an arithmetic number, because the mean of its divisors is an integer number (10941720).

Almost surely, 2^21883439 is an apocalyptic number.

21883439 is a deficient number, since it is larger than the sum of its proper divisors (1).

21883439 is an equidigital number, since it uses as much as digits as its factorization.

21883439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 38.

The square root of 21883439 is about 4677.9738135223. The cubic root of 21883439 is about 279.7081951479.

It can be divided in two parts, 21883 and 439, that added together give a palindrome (22322).

The spelling of 21883439 in words is "twenty-one million, eight hundred eighty-three thousand, four hundred thirty-nine".