12400023123423 has 24 divisors (see below), whose sum is σ = 19289118775472. Its totient is φ = 7630706746368.

The previous prime is 12400023123407. The next prime is 12400023123451. The reversal of 12400023123423 is 32432132000421.

12400023123423 is a `hidden beast` number, since 1 + 2 + 4 + 0 + 0 + 0 + 2 + 312 + 342 + 3 = 666.

It is not a de Polignac number, because 12400023123423 - 2⁴ = 12400023123407 is a prime.

It is a super-2 number, since 2×12400023123423² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12400023123463) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12514815 + ... + 13469247.

Almost surely, 2^{12400023123423} is an apocalyptic number.

12400023123423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12400023123423 is a deficient number, since it is larger than the sum of its proper divisors (6889095652049).

12400023123423 is a wasteful number, since it uses less digits than its factorization.

12400023123423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065495 (or 1065492 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 12400023123423 its reverse (32432132000421), we get a palindrome (44832155123844).

The spelling of 12400023123423 in words is "twelve trillion, four hundred billion, twenty-three million, one hundred twenty-three thousand, four hundred twenty-three".