18398071 has 2 divisors, whose sum is σ = 18398072. Its totient is φ = 18398070.

The previous prime is 18398069. The next prime is 18398101. The reversal of 18398071 is 17089381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18398071 - 2¹ = 18398069 is a prime.

Together with 18398069, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18398071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18398011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9199035 + 9199036.

It is an arithmetic number, because the mean of its divisors is an integer number (9199036).

Almost surely, 2^18398071 is an apocalyptic number.

18398071 is a deficient number, since it is larger than the sum of its proper divisors (1).

18398071 is an equidigital number, since it uses as much as digits as its factorization.

18398071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 18398071 is about 4289.2972617901. The cubic root of 18398071 is about 263.9919983418.

The spelling of 18398071 in words is "eighteen million, three hundred ninety-eight thousand, seventy-one".