22018308 has 96 divisors (see below), whose sum is σ = 59458560. Its totient is φ = 6289920.

The previous prime is 22018301. The next prime is 22018309. The reversal of 22018308 is 80381022.

It is not an unprimeable number, because it can be changed into a prime (22018301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140166 + ... + 140322.

It is an arithmetic number, because the mean of its divisors is an integer number (619360).

Almost surely, 2^22018308 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22018308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29729280).

22018308 is an abundant number, since it is smaller than the sum of its proper divisors (37440252).

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

22018308 is a wasteful number, since it uses less digits than its factorization.

22018308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 22018308 is about 4692.3669933201. The cubic root of 22018308 is about 280.2816383874.

It can be divided in two parts, 220 and 18308, that added together give a triangular number (18528 = T₁₉₂).

The spelling of 22018308 in words is "twenty-two million, eighteen thousand, three hundred eight".