18243311824 has 10 divisors (see below), whose sum is σ = 35346416690. Its totient is φ = 9121655904.

The previous prime is 18243311819. The next prime is 18243311839. The reversal of 18243311824 is 42811334281.

It can be written as a sum of positive squares in only one way, i.e., 15070017600 + 3173294224 = 122760^2 + 56332^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 570103479 + ... + 570103510.

It is an arithmetic number, because the mean of its divisors is an integer number (3534641669).

Almost surely, 2^18243311824 is an apocalyptic number.

It is an amenable number.

18243311824 is a deficient number, since it is larger than the sum of its proper divisors (17103104866).

18243311824 is a wasteful number, since it uses less digits than its factorization.

18243311824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140206997 (or 1140206991 counting only the distinct ones).

The product of its digits is 36864, while the sum is 37.

The spelling of 18243311824 in words is "eighteen billion, two hundred forty-three million, three hundred eleven thousand, eight hundred twenty-four".