20043123 has 4 divisors (see below), whose sum is σ = 26724168. Its totient is φ = 13362080.

The previous prime is 20043083. The next prime is 20043151. The reversal of 20043123 is 32134002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20043123 - 2⁶ = 20043059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20043223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3340518 + ... + 3340523.

It is an arithmetic number, because the mean of its divisors is an integer number (6681042).

Almost surely, 2^20043123 is an apocalyptic number.

20043123 is a deficient number, since it is larger than the sum of its proper divisors (6681045).

20043123 is an equidigital number, since it uses as much as digits as its factorization.

20043123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6681044.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 20043123 is about 4476.9546569069. The cubic root of 20043123 is about 271.6367113311.

Adding to 20043123 its reverse (32134002), we get a palindrome (52177125).

The spelling of 20043123 in words is "twenty million, forty-three thousand, one hundred twenty-three".