20345023 has 2 divisors, whose sum is σ = 20345024. Its totient is φ = 20345022.

The previous prime is 20345011. The next prime is 20345033. The reversal of 20345023 is 32054302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20345023 is a prime.

It is a super-3 number, since 3×20345023³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20345033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10172511 + 10172512.

It is an arithmetic number, because the mean of its divisors is an integer number (10172512).

Almost surely, 2^20345023 is an apocalyptic number.

20345023 is a deficient number, since it is larger than the sum of its proper divisors (1).

20345023 is an equidigital number, since it uses as much as digits as its factorization.

20345023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 20345023 is about 4510.5457541189. The cubic root of 20345023 is about 272.9937651481.

Adding to 20345023 its reverse (32054302), we get a palindrome (52399325).

The spelling of 20345023 in words is "twenty million, three hundred forty-five thousand, twenty-three".