18489463 has 2 divisors, whose sum is σ = 18489464. Its totient is φ = 18489462.

The previous prime is 18489433. The next prime is 18489467. The reversal of 18489463 is 36498481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18489463 - 2⁵ = 18489431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18489467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9244731 + 9244732.

It is an arithmetic number, because the mean of its divisors is an integer number (9244732).

Almost surely, 2^18489463 is an apocalyptic number.

18489463 is a deficient number, since it is larger than the sum of its proper divisors (1).

18489463 is an equidigital number, since it uses as much as digits as its factorization.

18489463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 43.

The square root of 18489463 is about 4299.9375576862. The cubic root of 18489463 is about 264.4284012830.

It can be divided in two parts, 1848 and 9463, that added together give a palindrome (11311).

The spelling of 18489463 in words is "eighteen million, four hundred eighty-nine thousand, four hundred sixty-three".