18545868 has 96 divisors (see below), whose sum is σ = 53464320. Its totient is φ = 5512320.

The previous prime is 18545867. The next prime is 18545873. The reversal of 18545868 is 86854581.

18545868 is a `hidden beast` number, since 18 + 54 + 586 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (18545867) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79480 + ... + 79712.

It is an arithmetic number, because the mean of its divisors is an integer number (556920).

Almost surely, 2^18545868 is an apocalyptic number.

18545868 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 18545868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26732160).

18545868 is an abundant number, since it is smaller than the sum of its proper divisors (34918452).

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

18545868 is a wasteful number, since it uses less digits than its factorization.

18545868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 316 counting only the distinct ones).

The product of its digits is 307200, while the sum is 45.

The square root of 18545868 is about 4306.4913793017. The cubic root of 18545868 is about 264.6970217165.

The spelling of 18545868 in words is "eighteen million, five hundred forty-five thousand, eight hundred sixty-eight".