18081027 has 24 divisors (see below), whose sum is σ = 28142400. Its totient is φ = 11149488.

The previous prime is 18081023. The next prime is 18081031. The reversal of 18081027 is 72018081.

It is an interprime number because it is at equal distance from previous prime (18081023) and next prime (18081031).

It is not a de Polignac number, because 18081027 - 2² = 18081023 is a prime.

It is a super-3 number, since 3×18081027³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (18081023) 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 23 ways as a sum of consecutive naturals, for example, 6124 + ... + 8582.

It is an arithmetic number, because the mean of its divisors is an integer number (1172600).

Almost surely, 2^18081027 is an apocalyptic number.

18081027 is a deficient number, since it is larger than the sum of its proper divisors (10061373).

18081027 is a wasteful number, since it uses less digits than its factorization.

18081027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2527 (or 2524 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 18081027 is about 4252.1790884204. The cubic root of 18081027 is about 262.4667930783.

The spelling of 18081027 in words is "eighteen million, eighty-one thousand, twenty-seven".