18198810 has 64 divisors (see below), whose sum is σ = 55468800. Its totient is φ = 4159296.

The previous prime is 18198799. The next prime is 18198833. The reversal of 18198810 is 1889181.

It is a super-4 number, since 4×18198810⁴ (a number of 30 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

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, 2925 + ... + 6704.

It is an arithmetic number, because the mean of its divisors is an integer number (866700).

Almost surely, 2^18198810 is an apocalyptic number.

18198810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18198810 is an abundant number, since it is smaller than the sum of its proper divisors (37269990).

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

18198810 is a wasteful number, since it uses less digits than its factorization.

18198810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9652 (or 9646 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 36.

The square root of 18198810 is about 4266.0063291092. The cubic root of 18198810 is about 263.0354783541.

The spelling of 18198810 in words is "eighteen million, one hundred ninety-eight thousand, eight hundred ten".