18381114 has 32 divisors (see below), whose sum is σ = 43251840. Its totient is φ = 5766336.

The previous prime is 18381107. The next prime is 18381149. The reversal of 18381114 is 41118381.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9094 + ... + 10929.

It is an arithmetic number, because the mean of its divisors is an integer number (1351620).

Almost surely, 2^18381114 is an apocalyptic number.

18381114 is an abundant number, since it is smaller than the sum of its proper divisors (24870726).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18381114 is a wasteful number, since it uses less digits than its factorization.

18381114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20051 (or 20045 counting only the distinct ones).

The product of its digits is 768, while the sum is 27.

The square root of 18381114 is about 4287.3201420001. The cubic root of 18381114 is about 263.9108686713.

Adding to 18381114 its reverse (41118381), we get a palindrome (59499495).

The spelling of 18381114 in words is "eighteen million, three hundred eighty-one thousand, one hundred fourteen".