18966463 has 2 divisors, whose sum is σ = 18966464. Its totient is φ = 18966462.

The previous prime is 18966461. The next prime is 18966469. The reversal of 18966463 is 36466981.

It is a weak prime.

It is an emirp because it is prime and its reverse (36466981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18966463 - 2¹ = 18966461 is a prime.

Together with 18966461, 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 (18966461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9483231 + 9483232.

It is an arithmetic number, because the mean of its divisors is an integer number (9483232).

Almost surely, 2^18966463 is an apocalyptic number.

18966463 is a deficient number, since it is larger than the sum of its proper divisors (1).

18966463 is an equidigital number, since it uses as much as digits as its factorization.

18966463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 43.

The square root of 18966463 is about 4355.0502867361. The cubic root of 18966463 is about 266.6830720810.

The spelling of 18966463 in words is "eighteen million, nine hundred sixty-six thousand, four hundred sixty-three".