18222275808 has 480 divisors, whose sum is σ = 60857153280. Its totient is φ = 5300951040.

The previous prime is 18222275779. The next prime is 18222275821. The reversal of 18222275808 is 80857222281.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 109115341 + ... + 109115507.

It is an arithmetic number, because the mean of its divisors is an integer number (126785736).

Almost surely, 2^18222275808 is an apocalyptic number.

18222275808 is a gapful number since it is divisible by the number (18) 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 18222275808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30428576640).

18222275808 is an abundant number, since it is smaller than the sum of its proper divisors (42634877472).

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

18222275808 is a wasteful number, since it uses less digits than its factorization.

18222275808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 45.

The spelling of 18222275808 in words is "eighteen billion, two hundred twenty-two million, two hundred seventy-five thousand, eight hundred eight".