18479916 has 72 divisors (see below), whose sum is σ = 57503264. Its totient is φ = 4872960.

The previous prime is 18479893. The next prime is 18479927. The reversal of 18479916 is 61997481.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 456 + ... + 6096.

Almost surely, 2^18479916 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 18479916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28751632).

18479916 is an abundant number, since it is smaller than the sum of its proper divisors (39023348).

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

18479916 is a wasteful number, since it uses less digits than its factorization.

18479916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5671 (or 5666 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 18479916 is about 4298.8272819456. The cubic root of 18479916 is about 264.3828810755.

The spelling of 18479916 in words is "eighteen million, four hundred seventy-nine thousand, nine hundred sixteen".