18225671 has 2 divisors, whose sum is σ = 18225672. Its totient is φ = 18225670.

The previous prime is 18225661. The next prime is 18225673. The reversal of 18225671 is 17652281.

It is a strong prime.

It is an emirp because it is prime and its reverse (17652281) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18225671 is a prime.

Together with 18225673, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18225673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9112835 + 9112836.

It is an arithmetic number, because the mean of its divisors is an integer number (9112836).

Almost surely, 2^18225671 is an apocalyptic number.

18225671 is a deficient number, since it is larger than the sum of its proper divisors (1).

18225671 is an equidigital number, since it uses as much as digits as its factorization.

18225671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 32.

The square root of 18225671 is about 4269.1534289599. The cubic root of 18225671 is about 263.1648260553.

Adding to 18225671 its sum of digits (32), we get a triangular number (18225703 = T₆₀₃₇).

The spelling of 18225671 in words is "eighteen million, two hundred twenty-five thousand, six hundred seventy-one".