20500343 has 2 divisors, whose sum is σ = 20500344. Its totient is φ = 20500342.

The previous prime is 20500339. The next prime is 20500357. The reversal of 20500343 is 34300502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20500343 - 2² = 20500339 is a prime.

It is a super-3 number, since 3×20500343³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20500313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10250171 + 10250172.

It is an arithmetic number, because the mean of its divisors is an integer number (10250172).

Almost surely, 2^20500343 is an apocalyptic number.

20500343 is a deficient number, since it is larger than the sum of its proper divisors (1).

20500343 is an equidigital number, since it uses as much as digits as its factorization.

20500343 is an evil number, because the sum of its binary digits is even.

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

The square root of 20500343 is about 4527.7304469237. The cubic root of 20500343 is about 273.6867101382.

Adding to 20500343 its reverse (34300502), we get a palindrome (54800845).

The spelling of 20500343 in words is "twenty million, five hundred thousand, three hundred forty-three".