18479664 has 180 divisors, whose sum is σ = 63032424. Its totient is φ = 5225472.

The previous prime is 18479653. The next prime is 18479677. The reversal of 18479664 is 46697481.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 190464 + ... + 190560.

Almost surely, 2^18479664 is an apocalyptic number.

18479664 is a gapful number since it is divisible by the number (14) 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 18479664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31516212).

18479664 is an abundant number, since it is smaller than the sum of its proper divisors (44552760).

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

18479664 is an equidigital number, since it uses as much as digits as its factorization.

18479664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 109 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 18479664 is about 4298.7979715265. The cubic root of 18479664 is about 264.3816793242.

It can be divided in two parts, 1847 and 9664, that added together give a palindrome (11511).

The spelling of 18479664 in words is "eighteen million, four hundred seventy-nine thousand, six hundred sixty-four".