18198912 has 64 divisors (see below), whose sum is σ = 49008960. Its totient is φ = 5982720.

The previous prime is 18198899. The next prime is 18198937. The reversal of 18198912 is 21989181.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31587 + ... + 32157.

It is an arithmetic number, because the mean of its divisors is an integer number (765765).

Almost surely, 2^18198912 is an apocalyptic number.

18198912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18198912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24504480).

18198912 is an abundant number, since it is smaller than the sum of its proper divisors (30810048).

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

18198912 is an equidigital number, since it uses as much as digits as its factorization.

18198912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671 (or 659 counting only the distinct ones).

The product of its digits is 10368, while the sum is 39.

The square root of 18198912 is about 4266.0182840677. The cubic root of 18198912 is about 263.0359697703.

It can be divided in two parts, 18198 and 912, that added together give a triangular number (19110 = T₁₉₅).

The spelling of 18198912 in words is "eighteen million, one hundred ninety-eight thousand, nine hundred twelve".