20617343 has 2 divisors, whose sum is σ = 20617344. Its totient is φ = 20617342.

The previous prime is 20617327. The next prime is 20617357. The reversal of 20617343 is 34371602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20617343 - 2⁴ = 20617327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20617313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10308671 + 10308672.

It is an arithmetic number, because the mean of its divisors is an integer number (10308672).

Almost surely, 2^20617343 is an apocalyptic number.

20617343 is a deficient number, since it is larger than the sum of its proper divisors (1).

20617343 is an equidigital number, since it uses as much as digits as its factorization.

20617343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 20617343 is about 4540.6324449354. The cubic root of 20617343 is about 274.2063863190.

Adding to 20617343 its reverse (34371602), we get a palindrome (54988945).

The spelling of 20617343 in words is "twenty million, six hundred seventeen thousand, three hundred forty-three".