18127089 has 6 divisors (see below), whose sum is σ = 26183586. Its totient is φ = 12084720.

The previous prime is 18127079. The next prime is 18127093. The reversal of 18127089 is 98072181.

It can be written as a sum of positive squares in only one way, i.e., 13198689 + 4928400 = 3633^2 + 2220^2 .

It is not a de Polignac number, because 18127089 - 2¹³ = 18118897 is a prime.

It is a super-2 number, since 2×18127089² = 657182711227842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18127019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1007052 + ... + 1007069.

It is an arithmetic number, because the mean of its divisors is an integer number (4363931).

Almost surely, 2^18127089 is an apocalyptic number.

It is an amenable number.

18127089 is a deficient number, since it is larger than the sum of its proper divisors (8056497).

18127089 is a wasteful number, since it uses less digits than its factorization.

18127089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2014127 (or 2014124 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 18127089 is about 4257.5919250205. The cubic root of 18127089 is about 262.6894849566.

The spelling of 18127089 in words is "eighteen million, one hundred twenty-seven thousand, eighty-nine".