18028471 has 2 divisors, whose sum is σ = 18028472. Its totient is φ = 18028470.

The previous prime is 18028469. The next prime is 18028477. The reversal of 18028471 is 17482081.

18028471 is nontrivially palindromic in base 15.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18028471 - 2¹ = 18028469 is a prime.

It is a super-3 number, since 3×18028471³ (a number of 23 digits) contains 333 as substring.

Together with 18028469, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18028477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9014235 + 9014236.

It is an arithmetic number, because the mean of its divisors is an integer number (9014236).

Almost surely, 2^18028471 is an apocalyptic number.

18028471 is a deficient number, since it is larger than the sum of its proper divisors (1).

18028471 is an equidigital number, since it uses as much as digits as its factorization.

18028471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 18028471 is about 4245.9947008917. The cubic root of 18028471 is about 262.2122427961.

The spelling of 18028471 in words is "eighteen million, twenty-eight thousand, four hundred seventy-one".