18623264 has 48 divisors (see below), whose sum is σ = 40352256. Its totient is φ = 8390400.

The previous prime is 18623263. The next prime is 18623273. The reversal of 18623264 is 46232681.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 18623264.

It is not an unprimeable number, because it can be changed into a prime (18623263) 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, 67094 + ... + 67370.

It is an arithmetic number, because the mean of its divisors is an integer number (840672).

Almost surely, 2^18623264 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 18623264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20176128).

18623264 is an abundant number, since it is smaller than the sum of its proper divisors (21728992).

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

18623264 is a wasteful number, since it uses less digits than its factorization.

18623264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489 (or 481 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 18623264 is about 4315.4679931613. The cubic root of 18623264 is about 265.0647237183.

The spelling of 18623264 in words is "eighteen million, six hundred twenty-three thousand, two hundred sixty-four".