18389363 has 2 divisors, whose sum is σ = 18389364. Its totient is φ = 18389362.

The previous prime is 18389317. The next prime is 18389389. The reversal of 18389363 is 36398381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18389363 - 2⁶ = 18389299 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18389363.

It is not a weakly prime, because it can be changed into another prime (18389303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9194681 + 9194682.

It is an arithmetic number, because the mean of its divisors is an integer number (9194682).

Almost surely, 2^18389363 is an apocalyptic number.

18389363 is a deficient number, since it is larger than the sum of its proper divisors (1).

18389363 is an equidigital number, since it uses as much as digits as its factorization.

18389363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 41.

The square root of 18389363 is about 4288.2820569547. The cubic root of 18389363 is about 263.9503417082.

The spelling of 18389363 in words is "eighteen million, three hundred eighty-nine thousand, three hundred sixty-three".