18840822 has 64 divisors (see below), whose sum is σ = 50609664. Its totient is φ = 4515840.

The previous prime is 18840817. The next prime is 18840847. The reversal of 18840822 is 22804881.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4438 + ... + 7574.

It is an arithmetic number, because the mean of its divisors is an integer number (790776).

Almost surely, 2^18840822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18840822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25304832).

18840822 is an abundant number, since it is smaller than the sum of its proper divisors (31768842).

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

18840822 is a wasteful number, since it uses less digits than its factorization.

18840822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3173.

The product of its (nonzero) digits is 8192, while the sum is 33.

The square root of 18840822 is about 4340.6015712111. The cubic root of 18840822 is about 266.0928972456.

Multiplying 18840822 by its sum of digits (33), we get a palindrome (621747126).

The spelling of 18840822 in words is "eighteen million, eight hundred forty thousand, eight hundred twenty-two".