18481443 has 16 divisors (see below), whose sum is σ = 26315520. Its totient is φ = 11509344.

The previous prime is 18481427. The next prime is 18481459. The reversal of 18481443 is 34418481.

It is an interprime number because it is at equal distance from previous prime (18481427) and next prime (18481459).

It is not a de Polignac number, because 18481443 - 2⁴ = 18481427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18481543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148 + ... + 6081.

It is an arithmetic number, because the mean of its divisors is an integer number (1644720).

Almost surely, 2^18481443 is an apocalyptic number.

18481443 is a deficient number, since it is larger than the sum of its proper divisors (7834077).

18481443 is a wasteful number, since it uses less digits than its factorization.

18481443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6298.

The product of its digits is 12288, while the sum is 33.

The square root of 18481443 is about 4299.0048848542. The cubic root of 18481443 is about 264.3901628824.

The spelling of 18481443 in words is "eighteen million, four hundred eighty-one thousand, four hundred forty-three".