18865264 has 40 divisors (see below), whose sum is σ = 40966128. Its totient is φ = 8340480.

The previous prime is 18865247. The next prime is 18865303. The reversal of 18865264 is 46256881.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5064 + ... + 7960.

Almost surely, 2^18865264 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 18865264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20483064).

18865264 is an abundant number, since it is smaller than the sum of its proper divisors (22100864).

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

18865264 is a wasteful number, since it uses less digits than its factorization.

18865264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2953 (or 2947 counting only the distinct ones).

The product of its digits is 92160, while the sum is 40.

The square root of 18865264 is about 4343.4161670280. The cubic root of 18865264 is about 266.2079140279.

The spelling of 18865264 in words is "eighteen million, eight hundred sixty-five thousand, two hundred sixty-four".