18027679 has 2 divisors, whose sum is σ = 18027680. Its totient is φ = 18027678.

The previous prime is 18027677. The next prime is 18027697. The reversal of 18027679 is 97672081.

Together with next prime (18027697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18027679 - 2¹ = 18027677 is a prime.

Together with 18027677, 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 (18027673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9013839 + 9013840.

It is an arithmetic number, because the mean of its divisors is an integer number (9013840).

Almost surely, 2^18027679 is an apocalyptic number.

18027679 is a deficient number, since it is larger than the sum of its proper divisors (1).

18027679 is an equidigital number, since it uses as much as digits as its factorization.

18027679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 18027679 is about 4245.9014355022. The cubic root of 18027679 is about 262.2084030337.

The spelling of 18027679 in words is "eighteen million, twenty-seven thousand, six hundred seventy-nine".