18195268 has 72 divisors (see below), whose sum is σ = 41179992. Its totient is φ = 6967296.

The previous prime is 18195227. The next prime is 18195269. The reversal of 18195268 is 86259181.

It can be written as a sum of positive squares in 4 ways, for example, as 1483524 + 16711744 = 1218^2 + 4088^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18195268.

It is not an unprimeable number, because it can be changed into a prime (18195269) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94180 + ... + 94372.

Almost surely, 2^18195268 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 18195268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20589996).

18195268 is an abundant number, since it is smaller than the sum of its proper divisors (22984724).

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

18195268 is a wasteful number, since it uses less digits than its factorization.

18195268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 252 counting only the distinct ones).

The product of its digits is 34560, while the sum is 40.

The square root of 18195268 is about 4265.5911665325. The cubic root of 18195268 is about 263.0184125476.

The spelling of 18195268 in words is "eighteen million, one hundred ninety-five thousand, two hundred sixty-eight".