20303123 has 2 divisors, whose sum is σ = 20303124. Its totient is φ = 20303122.

The previous prime is 20303119. The next prime is 20303137. The reversal of 20303123 is 32130302.

It is an a-pointer prime, because the next prime (20303137) can be obtained adding 20303123 to its sum of digits (14).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20303123 - 2² = 20303119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20303098 and 20303107.

It is not a weakly prime, because it can be changed into another prime (20303623) 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, 10151561 + 10151562.

It is an arithmetic number, because the mean of its divisors is an integer number (10151562).

Almost surely, 2^20303123 is an apocalyptic number.

20303123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20303123 is an equidigital number, since it uses as much as digits as its factorization.

20303123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 20303123 is about 4505.8986894958. The cubic root of 20303123 is about 272.8062286986.

Adding to 20303123 its reverse (32130302), we get a palindrome (52433425).

The spelling of 20303123 in words is "twenty million, three hundred three thousand, one hundred twenty-three".