18043284123 has 24 divisors (see below), whose sum is σ = 26549930160. Its totient is φ = 11804794560.

The previous prime is 18043284107. The next prime is 18043284143. The reversal of 18043284123 is 32148234081.

It is a happy number.

18043284123 is a `hidden beast` number, since 180 + 43 + 28 + 412 + 3 = 666.

It is not a de Polignac number, because 18043284123 - 2⁴ = 18043284107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18043284143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 206113 + ... + 280301.

It is an arithmetic number, because the mean of its divisors is an integer number (1106247090).

Almost surely, 2^18043284123 is an apocalyptic number.

18043284123 is a deficient number, since it is larger than the sum of its proper divisors (8506646037).

18043284123 is a wasteful number, since it uses less digits than its factorization.

18043284123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74699 (or 74696 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The spelling of 18043284123 in words is "eighteen billion, forty-three million, two hundred eighty-four thousand, one hundred twenty-three".