18242863 has 2 divisors, whose sum is σ = 18242864. Its totient is φ = 18242862.

The previous prime is 18242857. The next prime is 18242881. The reversal of 18242863 is 36824281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18242863 - 2²¹ = 16145711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18242803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9121431 + 9121432.

It is an arithmetic number, because the mean of its divisors is an integer number (9121432).

Almost surely, 2^18242863 is an apocalyptic number.

18242863 is a deficient number, since it is larger than the sum of its proper divisors (1).

18242863 is an equidigital number, since it uses as much as digits as its factorization.

18242863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 34.

The square root of 18242863 is about 4271.1664683082. The cubic root of 18242863 is about 263.2475465188.

The spelling of 18242863 in words is "eighteen million, two hundred forty-two thousand, eight hundred sixty-three".