18030071 has 2 divisors, whose sum is σ = 18030072. Its totient is φ = 18030070.

The previous prime is 18030059. The next prime is 18030073. The reversal of 18030071 is 17003081.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18030071 is a prime.

Together with 18030073, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1153136 and since 18030071 and 1153136 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18030073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9015035 + 9015036.

It is an arithmetic number, because the mean of its divisors is an integer number (9015036).

Almost surely, 2^18030071 is an apocalyptic number.

18030071 is a deficient number, since it is larger than the sum of its proper divisors (1).

18030071 is an equidigital number, since it uses as much as digits as its factorization.

18030071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 18030071 is about 4246.1831095703. The cubic root of 18030071 is about 262.2199995489.

The spelling of 18030071 in words is "eighteen million, thirty thousand, seventy-one".