18448471 has 2 divisors, whose sum is σ = 18448472. Its totient is φ = 18448470.

The previous prime is 18448453. The next prime is 18448481. The reversal of 18448471 is 17484481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18448471 - 2¹⁵ = 18415703 is a prime.

It is a super-3 number, since 3×18448471³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18448471.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18448481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9224235 + 9224236.

It is an arithmetic number, because the mean of its divisors is an integer number (9224236).

Almost surely, 2^18448471 is an apocalyptic number.

18448471 is a deficient number, since it is larger than the sum of its proper divisors (1).

18448471 is an equidigital number, since it uses as much as digits as its factorization.

18448471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28672, while the sum is 37.

The square root of 18448471 is about 4295.1683319749. The cubic root of 18448471 is about 264.2328399981.

The spelling of 18448471 in words is "eighteen million, four hundred forty-eight thousand, four hundred seventy-one".