18027471 has 16 divisors (see below), whose sum is σ = 29968128. Its totient is φ = 9364800.

The previous prime is 18027439. The next prime is 18027481. The reversal of 18027471 is 17472081.

18027471 = 314² + 315² + ... + 439².

It is not a de Polignac number, because 18027471 - 2⁵ = 18027439 is a prime.

It is a super-3 number, since 3×18027471³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18027431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38790 + ... + 39251.

It is an arithmetic number, because the mean of its divisors is an integer number (1873008).

Almost surely, 2^18027471 is an apocalyptic number.

18027471 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18027471 is a deficient number, since it is larger than the sum of its proper divisors (11940657).

18027471 is a wasteful number, since it uses less digits than its factorization.

18027471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78062.

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 18027471 is about 4245.8769412219. The cubic root of 18027471 is about 262.2073945926.

The spelling of 18027471 in words is "eighteen million, twenty-seven thousand, four hundred seventy-one".