18026419 has 4 divisors (see below), whose sum is σ = 18053496. Its totient is φ = 17999344.

The previous prime is 18026399. The next prime is 18026423. The reversal of 18026419 is 91462081.

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: 91462081 = 349 ⋅262069.

It is a cyclic number.

It is not a de Polignac number, because 18026419 - 2⁵ = 18026387 is a prime.

It is a super-2 number, since 2×18026419² = 649903563927122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18026219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12514 + ... + 13879.

It is an arithmetic number, because the mean of its divisors is an integer number (4513374).

Almost surely, 2^18026419 is an apocalyptic number.

18026419 is a deficient number, since it is larger than the sum of its proper divisors (27077).

18026419 is an equidigital number, since it uses as much as digits as its factorization.

18026419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27076.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 18026419 is about 4245.7530545240. The cubic root of 18026419 is about 262.2022940889.

The spelling of 18026419 in words is "eighteen million, twenty-six thousand, four hundred nineteen".