20130423 has 8 divisors (see below), whose sum is σ = 27101568. Its totient is φ = 13289784.

The previous prime is 20130413. The next prime is 20130449. The reversal of 20130423 is 32403102.

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

It is not a de Polignac number, because 20130423 - 2⁵ = 20130391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20130403) 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, 32265 + ... + 32882.

It is an arithmetic number, because the mean of its divisors is an integer number (3387696).

Almost surely, 2^20130423 is an apocalyptic number.

20130423 is a deficient number, since it is larger than the sum of its proper divisors (6971145).

20130423 is a wasteful number, since it uses less digits than its factorization.

20130423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65253.

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

The square root of 20130423 is about 4486.6939944685. The cubic root of 20130423 is about 272.0305211930.

Adding to 20130423 its reverse (32403102), we get a palindrome (52533525).

The spelling of 20130423 in words is "twenty million, one hundred thirty thousand, four hundred twenty-three".