18073858 has 16 divisors (see below), whose sum is σ = 29640960. Its totient is φ = 8197200.

The previous prime is 18073843. The next prime is 18073859. The reversal of 18073858 is 85837081.

It is a self number, because there is not a number n which added to its sum of digits gives 18073858.

It is not an unprimeable number, because it can be changed into a prime (18073859) 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, 17743 + ... + 18733.

It is an arithmetic number, because the mean of its divisors is an integer number (1852560).

Almost surely, 2^18073858 is an apocalyptic number.

18073858 is a deficient number, since it is larger than the sum of its proper divisors (11567102).

18073858 is a wasteful number, since it uses less digits than its factorization.

18073858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 18073858 is about 4251.3360252984. The cubic root of 18073858 is about 262.4320997471.

It can be divided in two parts, 1807 and 3858, that added together give a palindrome (5665).

The spelling of 18073858 in words is "eighteen million, seventy-three thousand, eight hundred fifty-eight".