18244715329 has 9 divisors (see below), whose sum is σ = 18346994569. Its totient is φ = 18143005360.

The previous prime is 18244715213. The next prime is 18244715381. The reversal of 18244715329 is 92351744281.

The square root of 18244715329 is 135073.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2356617025 + 15888098304 = 48545^2 + 126048^2 .

It is not a de Polignac number, because 18244715329 - 2¹¹ = 18244713281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18244715399) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 39576159 + ... + 39576619.

Almost surely, 2^18244715329 is an apocalyptic number.

18244715329 is the 135073-rd square number.

18244715329 is the 67537-th centered octagonal number.

It is an amenable number.

18244715329 is a deficient number, since it is larger than the sum of its proper divisors (102279240).

18244715329 is an frugal number, since it uses more digits than its factorization.

18244715329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508 (or 754 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The spelling of 18244715329 in words is "eighteen billion, two hundred forty-four million, seven hundred fifteen thousand, three hundred twenty-nine".