18279936 has 60 divisors (see below), whose sum is σ = 52770432. Its totient is φ = 6091776.

The previous prime is 18279929. The next prime is 18279953. The reversal of 18279936 is 63997281.

It is a junction number, because it is equal to n+sod(n) for n = 18279891 and 18279900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2625 + ... + 6591.

Almost surely, 2^18279936 is an apocalyptic number.

18279936 is a gapful number since it is divisible by the number (16) 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 18279936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26385216).

18279936 is an abundant number, since it is smaller than the sum of its proper divisors (34490496).

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

18279936 is an equidigital number, since it uses as much as digits as its factorization.

18279936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3991 (or 3972 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 18279936 is about 4275.5041807955. The cubic root of 18279936 is about 263.4257490442.

The spelling of 18279936 in words is "eighteen million, two hundred seventy-nine thousand, nine hundred thirty-six".