18318498 has 32 divisors (see below), whose sum is σ = 40122432. Its totient is φ = 5529600.

The previous prime is 18318463. The next prime is 18318499. The reversal of 18318498 is 89481381.

It is not an unprimeable number, because it can be changed into a prime (18318499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28258 + ... + 28898.

It is an arithmetic number, because the mean of its divisors is an integer number (1253826).

Almost surely, 2^18318498 is an apocalyptic number.

18318498 is an abundant number, since it is smaller than the sum of its proper divisors (21803934).

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

18318498 is a wasteful number, since it uses less digits than its factorization.

18318498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090.

The product of its digits is 55296, while the sum is 42.

The square root of 18318498 is about 4280.0114485828. The cubic root of 18318498 is about 263.6108534319.

It can be divided in two parts, 183 and 18498, that added together give a palindrome (18681).

The spelling of 18318498 in words is "eighteen million, three hundred eighteen thousand, four hundred ninety-eight".