21734411 has 2 divisors, whose sum is σ = 21734412. Its totient is φ = 21734410.

The previous prime is 21734389. The next prime is 21734417. The reversal of 21734411 is 11443712.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21734411 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21734417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10867205 + 10867206.

It is an arithmetic number, because the mean of its divisors is an integer number (10867206).

Almost surely, 2^21734411 is an apocalyptic number.

21734411 is a deficient number, since it is larger than the sum of its proper divisors (1).

21734411 is an equidigital number, since it uses as much as digits as its factorization.

21734411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 23.

The square root of 21734411 is about 4662.0179107335. The cubic root of 21734411 is about 279.0718031385.

The spelling of 21734411 in words is "twenty-one million, seven hundred thirty-four thousand, four hundred eleven".