18044427 has 8 divisors (see below), whose sum is σ = 24086160. Its totient is φ = 12016160.

The previous prime is 18044423. The next prime is 18044431. The reversal of 18044427 is 72444081.

It is an interprime number because it is at equal distance from previous prime (18044423) and next prime (18044431).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18044427 - 2² = 18044423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18044394 and 18044403.

It is not an unprimeable number, because it can be changed into a prime (18044423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349 + ... + 6017.

It is an arithmetic number, because the mean of its divisors is an integer number (3010770).

Almost surely, 2^18044427 is an apocalyptic number.

18044427 is a deficient number, since it is larger than the sum of its proper divisors (6041733).

18044427 is a wasteful number, since it uses less digits than its factorization.

18044427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6733.

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 18044427 is about 4247.8732325718. The cubic root of 18044427 is about 262.2895764915.

The spelling of 18044427 in words is "eighteen million, forty-four thousand, four hundred twenty-seven".