18396263 has 2 divisors, whose sum is σ = 18396264. Its totient is φ = 18396262.

The previous prime is 18396239. The next prime is 18396269. The reversal of 18396263 is 36269381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18396263 - 2¹² = 18392167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18396269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9198131 + 9198132.

It is an arithmetic number, because the mean of its divisors is an integer number (9198132).

Almost surely, 2^18396263 is an apocalyptic number.

18396263 is a deficient number, since it is larger than the sum of its proper divisors (1).

18396263 is an equidigital number, since it uses as much as digits as its factorization.

18396263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 38.

The square root of 18396263 is about 4289.0864994775. The cubic root of 18396263 is about 263.9833504575.

The spelling of 18396263 in words is "eighteen million, three hundred ninety-six thousand, two hundred sixty-three".