18427393 has 8 divisors (see below), whose sum is σ = 19274688. Its totient is φ = 17583984.

The previous prime is 18427391. The next prime is 18427399. The reversal of 18427393 is 39372481.

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 18427393 - 2¹ = 18427391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18427391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13446 + ... + 14752.

It is an arithmetic number, because the mean of its divisors is an integer number (2409336).

Almost surely, 2^18427393 is an apocalyptic number.

It is an amenable number.

18427393 is a deficient number, since it is larger than the sum of its proper divisors (847295).

18427393 is a wasteful number, since it uses less digits than its factorization.

18427393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943.

The product of its digits is 36288, while the sum is 37.

The square root of 18427393 is about 4292.7139434162. The cubic root of 18427393 is about 264.1321700065.

The spelling of 18427393 in words is "eighteen million, four hundred twenty-seven thousand, three hundred ninety-three".