21434341 has 2 divisors, whose sum is σ = 21434342. Its totient is φ = 21434340.

The previous prime is 21434327. The next prime is 21434353. The reversal of 21434341 is 14343412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16638241 + 4796100 = 4079^2 + 2190^2 .

It is a cyclic number.

It is not a de Polignac number, because 21434341 - 2⁷ = 21434213 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 (21431341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10717170 + 10717171.

It is an arithmetic number, because the mean of its divisors is an integer number (10717171).

Almost surely, 2^21434341 is an apocalyptic number.

It is an amenable number.

21434341 is a deficient number, since it is larger than the sum of its proper divisors (1).

21434341 is an equidigital number, since it uses as much as digits as its factorization.

21434341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 22.

The square root of 21434341 is about 4629.7236418603. The cubic root of 21434341 is about 277.7815382543.

Adding to 21434341 its reverse (14343412), we get a palindrome (35777753).

It can be divided in two parts, 2 and 1434341, that multiplied together give a palindrome (2868682).

The spelling of 21434341 in words is "twenty-one million, four hundred thirty-four thousand, three hundred forty-one".