18478064 has 40 divisors (see below), whose sum is σ = 39664128. Its totient is φ = 8268480.

The previous prime is 18478063. The next prime is 18478067. The reversal of 18478064 is 46087481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18478063) 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, 11009 + ... + 12575.

Almost surely, 2^18478064 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 18478064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19832064).

18478064 is an abundant number, since it is smaller than the sum of its proper divisors (21186064).

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

18478064 is a wasteful number, since it uses less digits than its factorization.

18478064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653 (or 1647 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 18478064 is about 4298.6118689642. The cubic root of 18478064 is about 264.3740489024.

The spelling of 18478064 in words is "eighteen million, four hundred seventy-eight thousand, sixty-four".