18840463 has 2 divisors, whose sum is σ = 18840464. Its totient is φ = 18840462.

The previous prime is 18840461. The next prime is 18840509. The reversal of 18840463 is 36404881.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18840463 - 2¹ = 18840461 is a prime.

Together with 18840461, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18840461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9420231 + 9420232.

It is an arithmetic number, because the mean of its divisors is an integer number (9420232).

Almost surely, 2^18840463 is an apocalyptic number.

18840463 is a deficient number, since it is larger than the sum of its proper divisors (1).

18840463 is an equidigital number, since it uses as much as digits as its factorization.

18840463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 18840463 is about 4340.5602172991. The cubic root of 18840463 is about 266.0912071574.

The spelling of 18840463 in words is "eighteen million, eight hundred forty thousand, four hundred sixty-three".