18344863 has 2 divisors, whose sum is σ = 18344864. Its totient is φ = 18344862.

The previous prime is 18344831. The next prime is 18344867. The reversal of 18344863 is 36844381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18344863 - 2⁵ = 18344831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18344867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9172431 + 9172432.

It is an arithmetic number, because the mean of its divisors is an integer number (9172432).

Almost surely, 2^18344863 is an apocalyptic number.

18344863 is a deficient number, since it is larger than the sum of its proper divisors (1).

18344863 is an equidigital number, since it uses as much as digits as its factorization.

18344863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 37.

The square root of 18344863 is about 4283.0903562731. The cubic root of 18344863 is about 263.7372606022.

The spelling of 18344863 in words is "eighteen million, three hundred forty-four thousand, eight hundred sixty-three".