18269868 has 48 divisors (see below), whose sum is σ = 45198720. Its totient is φ = 5727744.

The previous prime is 18269861. The next prime is 18269879. The reversal of 18269868 is 86896281.

It is not an unprimeable number, because it can be changed into a prime (18269861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51580 + ... + 51932.

It is an arithmetic number, because the mean of its divisors is an integer number (941640).

Almost surely, 2^18269868 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 18269868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22599360).

18269868 is an abundant number, since it is smaller than the sum of its proper divisors (26928852).

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

18269868 is a wasteful number, since it uses less digits than its factorization.

18269868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606 (or 604 counting only the distinct ones).

The product of its digits is 331776, while the sum is 48.

The square root of 18269868 is about 4274.3266136317. The cubic root of 18269868 is about 263.3773780233.

The spelling of 18269868 in words is "eighteen million, two hundred sixty-nine thousand, eight hundred sixty-eight".