20005343 has 2 divisors, whose sum is σ = 20005344. Its totient is φ = 20005342.

The previous prime is 20005319. The next prime is 20005351. The reversal of 20005343 is 34350002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20005343 - 2⁸ = 20005087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20005313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10002671 + 10002672.

It is an arithmetic number, because the mean of its divisors is an integer number (10002672).

Almost surely, 2^20005343 is an apocalyptic number.

20005343 is a deficient number, since it is larger than the sum of its proper divisors (1).

20005343 is an equidigital number, since it uses as much as digits as its factorization.

20005343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 20005343 is about 4472.7332806685. The cubic root of 20005343 is about 271.4659313962.

Adding to 20005343 its reverse (34350002), we get a palindrome (54355345).

The spelling of 20005343 in words is "twenty million, five thousand, three hundred forty-three".