18284863 has 2 divisors, whose sum is σ = 18284864. Its totient is φ = 18284862.

The previous prime is 18284837. The next prime is 18284879. The reversal of 18284863 is 36848281.

It is a strong prime.

It is an emirp because it is prime and its reverse (36848281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18284863 - 2⁵ = 18284831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18284263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9142431 + 9142432.

It is an arithmetic number, because the mean of its divisors is an integer number (9142432).

Almost surely, 2^18284863 is an apocalyptic number.

18284863 is a deficient number, since it is larger than the sum of its proper divisors (1).

18284863 is an equidigital number, since it uses as much as digits as its factorization.

18284863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73728, while the sum is 40.

The square root of 18284863 is about 4276.0803313315. The cubic root of 18284863 is about 263.4494140081.

The spelling of 18284863 in words is "eighteen million, two hundred eighty-four thousand, eight hundred sixty-three".