18454319 has 4 divisors (see below), whose sum is σ = 19873896. Its totient is φ = 17034744.

The previous prime is 18454313. The next prime is 18454357. The reversal of 18454319 is 91345481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91345481 = 227 ⋅402403.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18454319 is a prime.

It is a super-2 number, since 2×18454319² = 681123779507522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18454313) 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, 709769 + ... + 709794.

It is an arithmetic number, because the mean of its divisors is an integer number (4968474).

Almost surely, 2^18454319 is an apocalyptic number.

18454319 is a deficient number, since it is larger than the sum of its proper divisors (1419577).

18454319 is a wasteful number, since it uses less digits than its factorization.

18454319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419576.

The product of its digits is 17280, while the sum is 35.

The square root of 18454319 is about 4295.8490429716. The cubic root of 18454319 is about 264.2607568627.

The spelling of 18454319 in words is "eighteen million, four hundred fifty-four thousand, three hundred nineteen".