18168498 has 12 divisors (see below), whose sum is σ = 39365118. Its totient is φ = 6056160.

The previous prime is 18168487. The next prime is 18168523. The reversal of 18168498 is 89486181.

It can be written as a sum of positive squares in only one way, i.e., 17363889 + 804609 = 4167^2 + 897^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 504663 + ... + 504698.

Almost surely, 2^18168498 is an apocalyptic number.

18168498 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18168498 is an abundant number, since it is smaller than the sum of its proper divisors (21196620).

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

18168498 is a wasteful number, since it uses less digits than its factorization.

18168498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009369 (or 1009366 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 18168498 is about 4262.4521111679. The cubic root of 18168498 is about 262.8893596022.

The spelling of 18168498 in words is "eighteen million, one hundred sixty-eight thousand, four hundred ninety-eight".