20130123134403 has 32 divisors (see below), whose sum is σ = 31581862502400. Its totient is φ = 12628585991808.

The previous prime is 20130123134377. The next prime is 20130123134413. The reversal of 20130123134403 is 30443132103102.

It is a happy number.

20130123134403 is a `hidden beast` number, since 2 + 0 + 1 + 3 + 0 + 123 + 134 + 403 = 666.

It is not a de Polignac number, because 20130123134403 - 2⁵ = 20130123134371 is a prime.

It is a super-2 number, since 2×20130123134403² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20130123134413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 816951 + ... + 6397472.

It is an arithmetic number, because the mean of its divisors is an integer number (986933203200).

Almost surely, 2^{20130123134403} is an apocalyptic number.

20130123134403 is a deficient number, since it is larger than the sum of its proper divisors (11451739367997).

20130123134403 is a wasteful number, since it uses less digits than its factorization.

20130123134403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7220528 (or 7220522 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 20130123134403 its reverse (30443132103102), we get a palindrome (50573255237505).

It can be divided in two parts, 2013012 and 3134403, that added together give a palindrome (5147415).

The spelling of 20130123134403 in words is "twenty trillion, one hundred thirty billion, one hundred twenty-three million, one hundred thirty-four thousand, four hundred three".