123442020423 has 48 divisors (see below), whose sum is σ = 193324903200. Its totient is φ = 75597484032.

The previous prime is 123442020409. The next prime is 123442020439. The reversal of 123442020423 is 324020244321.

123442020423 is a `hidden beast` number, since 1 + 2 + 34 + 4 + 202 + 0 + 423 = 666.

It is not a de Polignac number, because 123442020423 - 2¹⁰ = 123442019399 is a prime.

It is a super-2 number, since 2×123442020423² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123442220423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10184815 + ... + 10196927.

It is an arithmetic number, because the mean of its divisors is an integer number (4027602150).

Almost surely, 2^123442020423 is an apocalyptic number.

123442020423 is a deficient number, since it is larger than the sum of its proper divisors (69882882777).

123442020423 is a wasteful number, since it uses less digits than its factorization.

123442020423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13728 (or 13725 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 123442020423 its reverse (324020244321), we get a palindrome (447462264744).

The spelling of 123442020423 in words is "one hundred twenty-three billion, four hundred forty-two million, twenty thousand, four hundred twenty-three".