18261168 has 20 divisors (see below), whose sum is σ = 47174808. Its totient is φ = 6087040.

The previous prime is 18261167. The next prime is 18261181. The reversal of 18261168 is 86116281.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (18261163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190173 + ... + 190268.

Almost surely, 2^18261168 is an apocalyptic number.

It is an amenable number.

18261168 is an abundant number, since it is smaller than the sum of its proper divisors (28913640).

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

18261168 is a wasteful number, since it uses less digits than its factorization.

18261168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380452 (or 380446 counting only the distinct ones).

The product of its digits is 4608, while the sum is 33.

The square root of 18261168 is about 4273.3087882810. The cubic root of 18261168 is about 263.3355651505.

The spelling of 18261168 in words is "eighteen million, two hundred sixty-one thousand, one hundred sixty-eight".