18066854569 has 9 divisors (see below), whose sum is σ = 18216605277. Its totient is φ = 17918328204.

The previous prime is 18066854563. The next prime is 18066854621. The reversal of 18066854569 is 96545866081.

The square root of 18066854569 is 134413.

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

It is not a de Polignac number, because 18066854569 - 2¹³ = 18066846377 is a prime.

It is a super-2 number, since 2×18066854569² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18066854563) 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 8 ways as a sum of consecutive naturals, for example, 18682924 + ... + 18683890.

It is an arithmetic number, because the mean of its divisors is an integer number (2024067253).

Almost surely, 2^18066854569 is an apocalyptic number.

18066854569 is the 134413-rd square number.

18066854569 is the 67207-th centered octagonal number.

It is an amenable number.

18066854569 is a deficient number, since it is larger than the sum of its proper divisors (149750708).

18066854569 is an frugal number, since it uses more digits than its factorization.

18066854569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212 (or 1106 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 58.

The spelling of 18066854569 in words is "eighteen billion, sixty-six million, eight hundred fifty-four thousand, five hundred sixty-nine".