18481454 has 4 divisors (see below), whose sum is σ = 27722184. Its totient is φ = 9240726.

The previous prime is 18481427. The next prime is 18481459. The reversal of 18481454 is 45418481.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45418481 = 499 ⋅91019.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18481459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4620362 + ... + 4620365.

It is an arithmetic number, because the mean of its divisors is an integer number (6930546).

Almost surely, 2^18481454 is an apocalyptic number.

18481454 is a deficient number, since it is larger than the sum of its proper divisors (9240730).

18481454 is an equidigital number, since it uses as much as digits as its factorization.

18481454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9240729.

The product of its digits is 20480, while the sum is 35.

The square root of 18481454 is about 4299.0061642198. The cubic root of 18481454 is about 264.3902153367.

The spelling of 18481454 in words is "eighteen million, four hundred eighty-one thousand, four hundred fifty-four".