20703143 has 2 divisors, whose sum is σ = 20703144. Its totient is φ = 20703142.

The previous prime is 20703131. The next prime is 20703191. The reversal of 20703143 is 34130702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20703143 - 2⁶ = 20703079 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20703113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10351571 + 10351572.

It is an arithmetic number, because the mean of its divisors is an integer number (10351572).

Almost surely, 2^20703143 is an apocalyptic number.

20703143 is a deficient number, since it is larger than the sum of its proper divisors (1).

20703143 is an equidigital number, since it uses as much as digits as its factorization.

20703143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 20703143 is about 4550.0706587920. The cubic root of 20703143 is about 274.5862339566.

Adding to 20703143 its reverse (34130702), we get a palindrome (54833845).

The spelling of 20703143 in words is "twenty million, seven hundred three thousand, one hundred forty-three".