18020263 has 2 divisors, whose sum is σ = 18020264. Its totient is φ = 18020262.

The previous prime is 18020251. The next prime is 18020267. The reversal of 18020263 is 36202081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18020263 - 2⁵ = 18020231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18020267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9010131 + 9010132.

It is an arithmetic number, because the mean of its divisors is an integer number (9010132).

Almost surely, 2^18020263 is an apocalyptic number.

18020263 is a deficient number, since it is larger than the sum of its proper divisors (1).

18020263 is an equidigital number, since it uses as much as digits as its factorization.

18020263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 18020263 is about 4245.0280328874. The cubic root of 18020263 is about 262.1724434366.

The spelling of 18020263 in words is "eighteen million, twenty thousand, two hundred sixty-three".