18022858 has 8 divisors (see below), whose sum is σ = 30896352. Its totient is φ = 7724076.

The previous prime is 18022847. The next prime is 18022859. The reversal of 18022858 is 85822081.

It is a happy number.

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 (18022859) 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, 643660 + ... + 643687.

It is an arithmetic number, because the mean of its divisors is an integer number (3862044).

Almost surely, 2^18022858 is an apocalyptic number.

18022858 is a deficient number, since it is larger than the sum of its proper divisors (12873494).

18022858 is a wasteful number, since it uses less digits than its factorization.

18022858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287356.

The product of its (nonzero) digits is 10240, while the sum is 34.

The square root of 18022858 is about 4245.3336735762. Note that the first 3 decimals coincide. The cubic root of 18022858 is about 262.1850275082.

The spelling of 18022858 in words is "eighteen million, twenty-two thousand, eight hundred fifty-eight".