18426263 has 2 divisors, whose sum is σ = 18426264. Its totient is φ = 18426262.

The previous prime is 18426253. The next prime is 18426269. The reversal of 18426263 is 36262481.

It is a strong prime.

It is an emirp because it is prime and its reverse (36262481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18426263 - 2¹⁸ = 18164119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18426269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9213131 + 9213132.

It is an arithmetic number, because the mean of its divisors is an integer number (9213132).

Almost surely, 2^18426263 is an apocalyptic number.

18426263 is a deficient number, since it is larger than the sum of its proper divisors (1).

18426263 is an equidigital number, since it uses as much as digits as its factorization.

18426263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 32.

The square root of 18426263 is about 4292.5823230312. The cubic root of 18426263 is about 264.1267708804.

The spelling of 18426263 in words is "eighteen million, four hundred twenty-six thousand, two hundred sixty-three".