18119858 has 16 divisors (see below), whose sum is σ = 28861920. Its totient is φ = 8502336.

The previous prime is 18119851. The next prime is 18119869. The reversal of 18119858 is 85891181.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18119851) 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, 17273 + ... + 18291.

It is an arithmetic number, because the mean of its divisors is an integer number (1803870).

Almost surely, 2^18119858 is an apocalyptic number.

18119858 is a deficient number, since it is larger than the sum of its proper divisors (10742062).

18119858 is a wasteful number, since it uses less digits than its factorization.

18119858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561.

The product of its digits is 23040, while the sum is 41.

The square root of 18119858 is about 4256.7426513709. The cubic root of 18119858 is about 262.6545508625.

The spelling of 18119858 in words is "eighteen million, one hundred nineteen thousand, eight hundred fifty-eight".