18566064 has 80 divisors (see below), whose sum is σ = 58151040. Its totient is φ = 5624640.

The previous prime is 18566063. The next prime is 18566077. The reversal of 18566064 is 46066581.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18566063) 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, 2799 + ... + 6705.

It is an arithmetic number, because the mean of its divisors is an integer number (726888).

Almost surely, 2^18566064 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 18566064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29075520).

18566064 is an abundant number, since it is smaller than the sum of its proper divisors (39584976).

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

18566064 is a wasteful number, since it uses less digits than its factorization.

18566064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3935 (or 3923 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 18566064 is about 4308.8355735628. The cubic root of 18566064 is about 264.7930697371.

The spelling of 18566064 in words is "eighteen million, five hundred sixty-six thousand, sixty-four".