22088816640 has 672 divisors, whose sum is σ = 87010232400. Its totient is φ = 5334958080.

The previous prime is 22088816597. The next prime is 22088816699. The reversal of 22088816640 is 4661888022.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 82114426 + ... + 82114694.

Almost surely, 2^22088816640 is an apocalyptic number.

22088816640 is a gapful number since it is divisible by the number (20) 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 22088816640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43505116200).

22088816640 is an abundant number, since it is smaller than the sum of its proper divisors (64921415760).

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

22088816640 is an equidigital number, since it uses as much as digits as its factorization.

22088816640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 45.

The spelling of 22088816640 in words is "twenty-two billion, eighty-eight million, eight hundred sixteen thousand, six hundred forty".