18406727 has 2 divisors, whose sum is σ = 18406728. Its totient is φ = 18406726.

The previous prime is 18406711. The next prime is 18406747. The reversal of 18406727 is 72760481.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18406727 - 2⁴ = 18406711 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18406747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9203363 + 9203364.

It is an arithmetic number, because the mean of its divisors is an integer number (9203364).

Almost surely, 2^18406727 is an apocalyptic number.

18406727 is a deficient number, since it is larger than the sum of its proper divisors (1).

18406727 is an equidigital number, since it uses as much as digits as its factorization.

18406727 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 18406727 is about 4290.3061662310. The cubic root of 18406727 is about 264.0333931971.

The spelling of 18406727 in words is "eighteen million, four hundred six thousand, seven hundred twenty-seven".