18093986 has 8 divisors (see below), whose sum is σ = 27164160. Its totient is φ = 9039268.

The previous prime is 18093983. The next prime is 18093991. The reversal of 18093986 is 68939081.

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

It is not an unprimeable number, because it can be changed into a prime (18093983) 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, 266 + ... + 6021.

It is an arithmetic number, because the mean of its divisors is an integer number (3395520).

Almost surely, 2^18093986 is an apocalyptic number.

18093986 is a deficient number, since it is larger than the sum of its proper divisors (9070174).

18093986 is a wasteful number, since it uses less digits than its factorization.

18093986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7728.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 18093986 is about 4253.7026224220. The cubic root of 18093986 is about 262.5294830074.

The spelling of 18093986 in words is "eighteen million, ninety-three thousand, nine hundred eighty-six".