18454660 has 48 divisors (see below), whose sum is σ = 44585856. Its totient is φ = 6285312.

The previous prime is 18454651. The next prime is 18454661. The reversal of 18454660 is 6645481.

It is not an unprimeable number, because it can be changed into a prime (18454661) 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, 26679 + ... + 27361.

It is an arithmetic number, because the mean of its divisors is an integer number (928872).

Almost surely, 2^18454660 is an apocalyptic number.

18454660 is a gapful number since it is divisible by the number (10) 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 18454660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22292928).

18454660 is an abundant number, since it is smaller than the sum of its proper divisors (26131196).

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

18454660 is a wasteful number, since it uses less digits than its factorization.

18454660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892 (or 890 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 18454660 is about 4295.8887322648. Note that the first 3 decimals coincide. The cubic root of 18454660 is about 264.2623845280.

The spelling of 18454660 in words is "eighteen million, four hundred fifty-four thousand, six hundred sixty".