18466481 has 4 divisors (see below), whose sum is σ = 20145264. Its totient is φ = 16787700.

The previous prime is 18466457. The next prime is 18466501.

18466481 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18466481 is a prime.

It is a super-2 number, since 2×18466481² = 682021841046722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18466411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 839375 + ... + 839396.

It is an arithmetic number, because the mean of its divisors is an integer number (5036316).

Almost surely, 2^18466481 is an apocalyptic number.

18466481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18466481 is a deficient number, since it is larger than the sum of its proper divisors (1678783).

18466481 is a wasteful number, since it uses less digits than its factorization.

18466481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678782.

The product of its digits is 36864, while the sum is 38.

The square root of 18466481 is about 4297.2643623589. The cubic root of 18466481 is about 264.3187962762.

The spelling of 18466481 in words is "eighteen million, four hundred sixty-six thousand, four hundred eighty-one".