18479424 has 56 divisors (see below), whose sum is σ = 49397920. Its totient is φ = 6096384.

The previous prime is 18479411. The next prime is 18479429. The reversal of 18479424 is 42497481.

It is a super-2 number, since 2×18479424² = 682978222743552, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18479429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20487 + ... + 21369.

Almost surely, 2^18479424 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 18479424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24698960).

18479424 is an abundant number, since it is smaller than the sum of its proper divisors (30918496).

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

18479424 is a wasteful number, since it uses less digits than its factorization.

18479424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007 (or 997 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 18479424 is about 4298.7700566557. The cubic root of 18479424 is about 264.3805347890.

The spelling of 18479424 in words is "eighteen million, four hundred seventy-nine thousand, four hundred twenty-four".