18046481 has 2 divisors, whose sum is σ = 18046482. Its totient is φ = 18046480.

The previous prime is 18046477. The next prime is 18046487. The reversal of 18046481 is 18464081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16128256 + 1918225 = 4016^2 + 1385^2 .

It is an emirp because it is prime and its reverse (18464081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18046481 - 2² = 18046477 is a prime.

It is a super-2 number, since 2×18046481² = 651350952966722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18046487) 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, 9023240 + 9023241.

It is an arithmetic number, because the mean of its divisors is an integer number (9023241).

Almost surely, 2^18046481 is an apocalyptic number.

It is an amenable number.

18046481 is a deficient number, since it is larger than the sum of its proper divisors (1).

18046481 is an equidigital number, since it uses as much as digits as its factorization.

18046481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 18046481 is about 4248.1149937355. The cubic root of 18046481 is about 262.2995282687.

The spelling of 18046481 in words is "eighteen million, forty-six thousand, four hundred eighty-one".