18393427 has 8 divisors (see below), whose sum is σ = 20144880. Its totient is φ = 16690080.

The previous prime is 18393421. The next prime is 18393437. The reversal of 18393427 is 72439381.

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 18393427 - 2¹¹ = 18391379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18393421) 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, 11224 + ... + 12757.

It is an arithmetic number, because the mean of its divisors is an integer number (2518110).

Almost surely, 2^18393427 is an apocalyptic number.

18393427 is a deficient number, since it is larger than the sum of its proper divisors (1751453).

18393427 is a wasteful number, since it uses less digits than its factorization.

18393427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24053.

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

The square root of 18393427 is about 4288.7558802058. The cubic root of 18393427 is about 263.9697843824.

The spelling of 18393427 in words is "eighteen million, three hundred ninety-three thousand, four hundred twenty-seven".