18789007329 has 9 divisors (see below), whose sum is σ = 27140271249. Its totient is φ = 12525730740.

The previous prime is 18789007327. The next prime is 18789007331. The reversal of 18789007329 is 92370098781.

The square root of 18789007329 is 137073.

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

It is an interprime number because it is at equal distance from previous prime (18789007327) and next prime (18789007331).

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 18789007329 - 2¹ = 18789007327 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18789007327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 388374 + ... + 434064.

Almost surely, 2^18789007329 is an apocalyptic number.

18789007329 is the 137073-rd square number.

18789007329 is the 68537-th centered octagonal number.

It is an amenable number.

18789007329 is a deficient number, since it is larger than the sum of its proper divisors (8351263920).

18789007329 is an frugal number, since it uses more digits than its factorization.

18789007329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91388 (or 45694 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The spelling of 18789007329 in words is "eighteen billion, seven hundred eighty-nine million, seven thousand, three hundred twenty-nine".