18024108921361 has 9 divisors (see below), whose sum is σ = 18624423359529. Its totient is φ = 17442558688500.

The previous prime is 18024108921337. The next prime is 18024108921373. The reversal of 18024108921361 is 16312980142081.

The square root of 18024108921361 is 4245481.

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

It is not a de Polignac number, because 18024108921361 - 2¹³ = 18024108913169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18024108901361) 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, 131541436 + ... + 131678386.

It is an arithmetic number, because the mean of its divisors is an integer number (2069380373281).

Almost surely, 2^{18024108921361} is an apocalyptic number.

18024108921361 is the 4245481-st square number.

18024108921361 is the 2122741-st centered octagonal number.

It is an amenable number.

18024108921361 is a deficient number, since it is larger than the sum of its proper divisors (600314438168).

18024108921361 is an frugal number, since it uses more digits than its factorization.

18024108921361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273964 (or 136982 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 46.

The spelling of 18024108921361 in words is "eighteen trillion, twenty-four billion, one hundred eight million, nine hundred twenty-one thousand, three hundred sixty-one".