20310123 has 8 divisors (see below), whose sum is σ = 27149968. Its totient is φ = 13505184.

The previous prime is 20310119. The next prime is 20310131. The reversal of 20310123 is 32101302.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20310123 - 2² = 20310119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20310099 and 20310108.

It is not an unprimeable number, because it can be changed into a prime (20310163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7336 + ... + 9717.

It is an arithmetic number, because the mean of its divisors is an integer number (3393746).

Almost surely, 2^20310123 is an apocalyptic number.

20310123 is a deficient number, since it is larger than the sum of its proper divisors (6839845).

20310123 is a wasteful number, since it uses less digits than its factorization.

20310123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17453.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 20310123 is about 4506.6753821415. The cubic root of 20310123 is about 272.8375773106.

Adding to 20310123 its reverse (32101302), we get a palindrome (52411425).

The spelling of 20310123 in words is "twenty million, three hundred ten thousand, one hundred twenty-three".