18555648 has 72 divisors (see below), whose sum is σ = 50797488. Its totient is φ = 6008832.

The previous prime is 18555643. The next prime is 18555683. The reversal of 18555648 is 84655581.

It is not an unprimeable number, because it can be changed into a prime (18555643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28090 + ... + 28742.

Almost surely, 2^18555648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18555648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25398744).

18555648 is an abundant number, since it is smaller than the sum of its proper divisors (32241840).

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

18555648 is an equidigital number, since it uses as much as digits as its factorization.

18555648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709 (or 695 counting only the distinct ones).

The product of its digits is 192000, while the sum is 42.

The square root of 18555648 is about 4307.6267247755. The cubic root of 18555648 is about 264.7435420871.

It can be divided in two parts, 1855 and 5648, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 18555648 in words is "eighteen million, five hundred fifty-five thousand, six hundred forty-eight".