18806844 has 48 divisors (see below), whose sum is σ = 50855168. Its totient is φ = 5298048.

The previous prime is 18806831. The next prime is 18806861. The reversal of 18806844 is 44860881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4599 + ... + 7665.

Almost surely, 2^18806844 is an apocalyptic number.

18806844 is a gapful number since it is divisible by the number (14) 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 18806844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25427584).

18806844 is an abundant number, since it is smaller than the sum of its proper divisors (32048324).

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

18806844 is a wasteful number, since it uses less digits than its factorization.

18806844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3154 (or 3152 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 39.

The square root of 18806844 is about 4336.6858313694. The cubic root of 18806844 is about 265.9328415075.

The spelling of 18806844 in words is "eighteen million, eight hundred six thousand, eight hundred forty-four".