22000000008 has 96 divisors (see below), whose sum is σ = 64015997760. Its totient is φ = 6282138240.

The previous prime is 22000000007. The next prime is 22000000021. The reversal of 22000000008 is 80000000022.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (22000000007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2607685 + ... + 2616107.

It is an arithmetic number, because the mean of its divisors is an integer number (666833310).

Almost surely, 2^22000000008 is an apocalyptic number.

22000000008 is a gapful number since it is divisible by the number (28) 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 22000000008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32007998880).

22000000008 is an abundant number, since it is smaller than the sum of its proper divisors (42015997752).

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

22000000008 is a wasteful number, since it uses less digits than its factorization.

22000000008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10667 (or 10656 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The spelling of 22000000008 in words is "twenty-two billion, eight", and thus it is an aban number and an uban number.