18027673 has 2 divisors, whose sum is σ = 18027674. Its totient is φ = 18027672.

The previous prime is 18027661. The next prime is 18027677. The reversal of 18027673 is 37672081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14197824 + 3829849 = 3768^2 + 1957^2 .

It is an emirp because it is prime and its reverse (37672081) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18027673 is a prime.

It is not a weakly prime, because it can be changed into another prime (18027677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9013836 + 9013837.

It is an arithmetic number, because the mean of its divisors is an integer number (9013837).

Almost surely, 2^18027673 is an apocalyptic number.

It is an amenable number.

18027673 is a deficient number, since it is larger than the sum of its proper divisors (1).

18027673 is an equidigital number, since it uses as much as digits as its factorization.

18027673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 18027673 is about 4245.9007289384. The cubic root of 18027673 is about 262.2083739442.

The spelling of 18027673 in words is "eighteen million, twenty-seven thousand, six hundred seventy-three".