20031343 has 2 divisors, whose sum is σ = 20031344. Its totient is φ = 20031342.

The previous prime is 20031331. The next prime is 20031359. The reversal of 20031343 is 34313002.

It is an a-pointer prime, because the next prime (20031359) can be obtained adding 20031343 to its sum of digits (16).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20031343 - 2⁵ = 20031311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20031313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10015671 + 10015672.

It is an arithmetic number, because the mean of its divisors is an integer number (10015672).

Almost surely, 2^20031343 is an apocalyptic number.

20031343 is a deficient number, since it is larger than the sum of its proper divisors (1).

20031343 is an equidigital number, since it uses as much as digits as its factorization.

20031343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 20031343 is about 4475.6388370824. The cubic root of 20031343 is about 271.5834843040.

Adding to 20031343 its reverse (34313002), we get a palindrome (54344345).

The spelling of 20031343 in words is "twenty million, thirty-one thousand, three hundred forty-three".