18051419 has 4 divisors (see below), whose sum is σ = 18075144. Its totient is φ = 18027696.

The previous prime is 18051413. The next prime is 18051457. The reversal of 18051419 is 91415081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91415081 = 457 ⋅200033.

It is a cyclic number.

It is not a de Polignac number, because 18051419 - 2⁴ = 18051403 is a prime.

It is a super-2 number, since 2×18051419² = 651707455827122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18051391 and 18051400.

It is not an unprimeable number, because it can be changed into a prime (18051413) 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, 10682 + ... + 12255.

It is an arithmetic number, because the mean of its divisors is an integer number (4518786).

Almost surely, 2^18051419 is an apocalyptic number.

18051419 is a deficient number, since it is larger than the sum of its proper divisors (23725).

18051419 is an equidigital number, since it uses as much as digits as its factorization.

18051419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23724.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 18051419 is about 4248.6961529392. The cubic root of 18051419 is about 262.3234501430.

The spelling of 18051419 in words is "eighteen million, fifty-one thousand, four hundred nineteen".