20130123 has 8 divisors (see below), whose sum is σ = 28904848. Its totient is φ = 12387744.

The previous prime is 20130079. The next prime is 20130163. The reversal of 20130123 is 32103102.

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 20130123 - 2¹⁶ = 20064587 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20130099 and 20130108.

It is not an unprimeable number, because it can be changed into a prime (20130163) 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, 258040 + ... + 258117.

It is an arithmetic number, because the mean of its divisors is an integer number (3613106).

Almost surely, 2^20130123 is an apocalyptic number.

20130123 is a deficient number, since it is larger than the sum of its proper divisors (8774725).

20130123 is a wasteful number, since it uses less digits than its factorization.

20130123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516173.

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

The square root of 20130123 is about 4486.6605621553. The cubic root of 20130123 is about 272.0291698460.

Adding to 20130123 its reverse (32103102), we get a palindrome (52233225).

The spelling of 20130123 in words is "twenty million, one hundred thirty thousand, one hundred twenty-three".