18316548 has 54 divisors (see below), whose sum is σ = 49308714. Its totient is φ = 5713152.

The previous prime is 18316537. The next prime is 18316549. The reversal of 18316548 is 84561381.

It can be written as a sum of positive squares in 3 ways, for example, as 13307904 + 5008644 = 3648^2 + 2238^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (18316549) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 105790 + ... + 105962.

Almost surely, 2^18316548 is an apocalyptic number.

18316548 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18316548, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24654357).

18316548 is an abundant number, since it is smaller than the sum of its proper divisors (30992166).

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

18316548 is a wasteful number, since it uses less digits than its factorization.

18316548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373 (or 195 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 18316548 is about 4279.7836393911. The cubic root of 18316548 is about 263.6014993279.

The spelling of 18316548 in words is "eighteen million, three hundred sixteen thousand, five hundred forty-eight".