18345543124 has 12 divisors (see below), whose sum is σ = 32272789248. Its totient is φ = 9124746200.

The previous prime is 18345543109. The next prime is 18345543127. The reversal of 18345543124 is 42134554381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18345543127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12005482 + ... + 12007009.

It is an arithmetic number, because the mean of its divisors is an integer number (2689399104).

Almost surely, 2^18345543124 is an apocalyptic number.

It is an amenable number.

18345543124 is a deficient number, since it is larger than the sum of its proper divisors (13927246124).

18345543124 is a wasteful number, since it uses less digits than its factorization.

18345543124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24012686 (or 24012684 counting only the distinct ones).

The product of its digits is 230400, while the sum is 40.

The spelling of 18345543124 in words is "eighteen billion, three hundred forty-five million, five hundred forty-three thousand, one hundred twenty-four".