20206343 has 2 divisors, whose sum is σ = 20206344. Its totient is φ = 20206342.

The previous prime is 20206331. The next prime is 20206349. The reversal of 20206343 is 34360202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20206343 - 2⁶ = 20206279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20206349) 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, 10103171 + 10103172.

It is an arithmetic number, because the mean of its divisors is an integer number (10103172).

Almost surely, 2^20206343 is an apocalyptic number.

20206343 is a deficient number, since it is larger than the sum of its proper divisors (1).

20206343 is an equidigital number, since it uses as much as digits as its factorization.

20206343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 20206343 is about 4495.1466049507. The cubic root of 20206343 is about 272.3720713660.

Adding to 20206343 its reverse (34360202), we get a palindrome (54566545).

The spelling of 20206343 in words is "twenty million, two hundred six thousand, three hundred forty-three".