18518363 has 2 divisors, whose sum is σ = 18518364. Its totient is φ = 18518362.

The previous prime is 18518341. The next prime is 18518393. The reversal of 18518363 is 36381581.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18518363 - 2⁶ = 18518299 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18518303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9259181 + 9259182.

It is an arithmetic number, because the mean of its divisors is an integer number (9259182).

Almost surely, 2^18518363 is an apocalyptic number.

18518363 is a deficient number, since it is larger than the sum of its proper divisors (1).

18518363 is an equidigital number, since it uses as much as digits as its factorization.

18518363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 35.

The square root of 18518363 is about 4303.2967594624. The cubic root of 18518363 is about 264.5661013818.

It can be divided in two parts, 18518 and 363, that added together give a palindrome (18881).

The spelling of 18518363 in words is "eighteen million, five hundred eighteen thousand, three hundred sixty-three".