18241806 has 64 divisors (see below), whose sum is σ = 42425856. Its totient is φ = 5174400.

The previous prime is 18241801. The next prime is 18241807. The reversal of 18241806 is 60814281.

It is a super-2 number, since 2×18241806² = 665526972283272, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18241801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92500 + ... + 92696.

It is an arithmetic number, because the mean of its divisors is an integer number (662904).

Almost surely, 2^18241806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18241806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21212928).

18241806 is an abundant number, since it is smaller than the sum of its proper divisors (24184050).

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

18241806 is a wasteful number, since it uses less digits than its factorization.

18241806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 18241806 is about 4271.0427298261. The cubic root of 18241806 is about 263.2424621920.

The spelling of 18241806 in words is "eighteen million, two hundred forty-one thousand, eight hundred six".