18809622 has 48 divisors (see below), whose sum is σ = 45322368. Its totient is φ = 5598720.

The previous prime is 18809621. The next prime is 18809627. The reversal of 18809622 is 22690881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18809621) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 5958 + ... + 8550.

It is an arithmetic number, because the mean of its divisors is an integer number (944216).

Almost surely, 2^18809622 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18809622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22661184).

18809622 is an abundant number, since it is smaller than the sum of its proper divisors (26512746).

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

18809622 is a wasteful number, since it uses less digits than its factorization.

18809622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2645 (or 2642 counting only the distinct ones).

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

The square root of 18809622 is about 4337.0061102101. The cubic root of 18809622 is about 265.9459347031.

The spelling of 18809622 in words is "eighteen million, eight hundred nine thousand, six hundred twenty-two".