18454519 has 2 divisors, whose sum is σ = 18454520. Its totient is φ = 18454518.

The previous prime is 18454511. The next prime is 18454543. The reversal of 18454519 is 91545481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18454519 - 2³ = 18454511 is a prime.

It is a super-2 number, since 2×18454519² = 681138543042722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18454511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9227259 + 9227260.

It is an arithmetic number, because the mean of its divisors is an integer number (9227260).

Almost surely, 2^18454519 is an apocalyptic number.

18454519 is a deficient number, since it is larger than the sum of its proper divisors (1).

18454519 is an equidigital number, since it uses as much as digits as its factorization.

18454519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 37.

The square root of 18454519 is about 4295.8723211939. The cubic root of 18454519 is about 264.2617115075.

The spelling of 18454519 in words is "eighteen million, four hundred fifty-four thousand, five hundred nineteen".