20109343 has 2 divisors, whose sum is σ = 20109344. Its totient is φ = 20109342.

The previous prime is 20109319. The next prime is 20109377. The reversal of 20109343 is 34390102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20109343 - 2¹⁷ = 19978271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20109043) 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, 10054671 + 10054672.

It is an arithmetic number, because the mean of its divisors is an integer number (10054672).

Almost surely, 2^20109343 is an apocalyptic number.

20109343 is a deficient number, since it is larger than the sum of its proper divisors (1).

20109343 is an equidigital number, since it uses as much as digits as its factorization.

20109343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 20109343 is about 4484.3442106957. The cubic root of 20109343 is about 271.9355338500.

Adding to 20109343 its reverse (34390102), we get a palindrome (54499445).

The spelling of 20109343 in words is "twenty million, one hundred nine thousand, three hundred forty-three".