20123203 has 4 divisors (see below), whose sum is σ = 20176128. Its totient is φ = 20070280.

The previous prime is 20123179. The next prime is 20123231. The reversal of 20123203 is 30232102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30232102 = 2 ⋅15116051.

It is a cyclic number.

It is not a de Polignac number, because 20123203 - 2⁵ = 20123171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20123263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25888 + ... + 26653.

It is an arithmetic number, because the mean of its divisors is an integer number (5044032).

Almost surely, 2^20123203 is an apocalyptic number.

20123203 is a deficient number, since it is larger than the sum of its proper divisors (52925).

20123203 is an equidigital number, since it uses as much as digits as its factorization.

20123203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52924.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 20123203 is about 4485.8893209708. The cubic root of 20123203 is about 271.9979950472.

Adding to 20123203 its reverse (30232102), we get a palindrome (50355305).

The spelling of 20123203 in words is "twenty million, one hundred twenty-three thousand, two hundred three".