18455481 has 12 divisors (see below), whose sum is σ = 29081520. Its totient is φ = 11185080.

The previous prime is 18455477. The next prime is 18455497.

18455481 is nontrivially palindromic in base 10.

18455481 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 18455481 - 2² = 18455477 is a prime.

It is a super-2 number, since 2×18455481² = 681209557882722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18455431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93111 + ... + 93308.

It is an arithmetic number, because the mean of its divisors is an integer number (2423460).

Almost surely, 2^18455481 is an apocalyptic number.

18455481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18455481 is a deficient number, since it is larger than the sum of its proper divisors (10626039).

18455481 is a wasteful number, since it uses less digits than its factorization.

18455481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186436 (or 186433 counting only the distinct ones).

The product of its digits is 25600, while the sum is 36.

The square root of 18455481 is about 4295.9842876808. The cubic root of 18455481 is about 264.2663032528.

The spelling of 18455481 in words is "eighteen million, four hundred fifty-five thousand, four hundred eighty-one".