18311148 has 18 divisors (see below), whose sum is σ = 46286604. Its totient is φ = 6103704.

The previous prime is 18311147. The next prime is 18311171. The reversal of 18311148 is 84111381.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (18311141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 254286 + ... + 254357.

It is an arithmetic number, because the mean of its divisors is an integer number (2571478).

Almost surely, 2^18311148 is an apocalyptic number.

18311148 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18311148 is an abundant number, since it is smaller than the sum of its proper divisors (27975456).

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

18311148 is a wasteful number, since it uses less digits than its factorization.

18311148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508653 (or 508648 counting only the distinct ones).

The product of its digits is 768, while the sum is 27.

The square root of 18311148 is about 4279.1527198734. The cubic root of 18311148 is about 263.5755921900.

The spelling of 18311148 in words is "eighteen million, three hundred eleven thousand, one hundred forty-eight".