21422341 has 2 divisors, whose sum is σ = 21422342. Its totient is φ = 21422340.

The previous prime is 21422327. The next prime is 21422347. The reversal of 21422341 is 14322412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14791716 + 6630625 = 3846^2 + 2575^2 .

It is a cyclic number.

It is not a de Polignac number, because 21422341 - 2¹¹ = 21420293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21422347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10711170 + 10711171.

It is an arithmetic number, because the mean of its divisors is an integer number (10711171).

Almost surely, 2^21422341 is an apocalyptic number.

It is an amenable number.

21422341 is a deficient number, since it is larger than the sum of its proper divisors (1).

21422341 is an equidigital number, since it uses as much as digits as its factorization.

21422341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 19.

The square root of 21422341 is about 4628.4274867389. The cubic root of 21422341 is about 277.7296899809.

Adding to 21422341 its reverse (14322412), we get a palindrome (35744753).

The spelling of 21422341 in words is "twenty-one million, four hundred twenty-two thousand, three hundred forty-one".