18349427 has 8 divisors (see below), whose sum is σ = 19404672. Its totient is φ = 17323200.

The previous prime is 18349417. The next prime is 18349439. The reversal of 18349427 is 72494381.

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 18349427 - 2¹⁰ = 18348403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18349417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5948 + ... + 8489.

It is an arithmetic number, because the mean of its divisors is an integer number (2425584).

Almost surely, 2^18349427 is an apocalyptic number.

18349427 is a deficient number, since it is larger than the sum of its proper divisors (1055245).

18349427 is a wasteful number, since it uses less digits than its factorization.

18349427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14509.

The product of its digits is 48384, while the sum is 38.

The square root of 18349427 is about 4283.6231160082. The cubic root of 18349427 is about 263.7591304312.

The spelling of 18349427 in words is "eighteen million, three hundred forty-nine thousand, four hundred twenty-seven".