18922806 has 48 divisors (see below), whose sum is σ = 47174400. Its totient is φ = 5369904.

The previous prime is 18922793. The next prime is 18922807. The reversal of 18922806 is 60822981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18922807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22135 + ... + 22973.

It is an arithmetic number, because the mean of its divisors is an integer number (982800).

Almost surely, 2^18922806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18922806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23587200).

18922806 is an abundant number, since it is smaller than the sum of its proper divisors (28251594).

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

18922806 is a wasteful number, since it uses less digits than its factorization.

18922806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033 (or 1030 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 18922806 is about 4350.0351722716. The cubic root of 18922806 is about 266.4782978736.

The spelling of 18922806 in words is "eighteen million, nine hundred twenty-two thousand, eight hundred six".