20331023 has 2 divisors, whose sum is σ = 20331024. Its totient is φ = 20331022.

The previous prime is 20330993. The next prime is 20331043. The reversal of 20331023 is 32013302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20331023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20330989 and 20331007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20331043) 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, 10165511 + 10165512.

It is an arithmetic number, because the mean of its divisors is an integer number (10165512).

Almost surely, 2^20331023 is an apocalyptic number.

20331023 is a deficient number, since it is larger than the sum of its proper divisors (1).

20331023 is an equidigital number, since it uses as much as digits as its factorization.

20331023 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 20331023 is about 4508.9935684141. The cubic root of 20331023 is about 272.9311324720.

Adding to 20331023 its reverse (32013302), we get a palindrome (52344325).

The spelling of 20331023 in words is "twenty million, three hundred thirty-one thousand, twenty-three".