18340027 has 4 divisors (see below), whose sum is σ = 18405576. Its totient is φ = 18274480.

The previous prime is 18340019. The next prime is 18340033. The reversal of 18340027 is 72004381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72004381 = 2213 ⋅32537.

It is a cyclic number.

It is not a de Polignac number, because 18340027 - 2³ = 18340019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18339983 and 18340010.

It is not an unprimeable number, because it can be changed into a prime (18340057) 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, 32353 + ... + 32914.

It is an arithmetic number, because the mean of its divisors is an integer number (4601394).

Almost surely, 2^18340027 is an apocalyptic number.

18340027 is a deficient number, since it is larger than the sum of its proper divisors (65549).

18340027 is an equidigital number, since it uses as much as digits as its factorization.

18340027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65548.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 18340027 is about 4282.5257734192. The cubic root of 18340027 is about 263.7140834421.

The spelling of 18340027 in words is "eighteen million, three hundred forty thousand, twenty-seven".