20354123 has 2 divisors, whose sum is σ = 20354124. Its totient is φ = 20354122.

The previous prime is 20354119. The next prime is 20354129. The reversal of 20354123 is 32145302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20354123 - 2² = 20354119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20354095 and 20354104.

It is not a weakly prime, because it can be changed into another prime (20354129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10177061 + 10177062.

It is an arithmetic number, because the mean of its divisors is an integer number (10177062).

Almost surely, 2^20354123 is an apocalyptic number.

20354123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20354123 is an equidigital number, since it uses as much as digits as its factorization.

20354123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 20354123 is about 4511.5543884564. The cubic root of 20354123 is about 273.0344609810.

Adding to 20354123 its reverse (32145302), we get a palindrome (52499425).

The spelling of 20354123 in words is "twenty million, three hundred fifty-four thousand, one hundred twenty-three".