22000001000 has 32 divisors (see below), whose sum is σ = 51480004680. Its totient is φ = 8800000000.

The previous prime is 22000000961. The next prime is 22000001003. The reversal of 22000001000 is 10000022.

It can be written as a sum of positive squares in 4 ways, for example, as 2165785444 + 19834215556 = 46538^2 + 140834^2 .

It is a Harshad number since it is a multiple of its sum of digits (5).

It is not an unprimeable number, because it can be changed into a prime (22000001003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10999001 + ... + 11001000.

Almost surely, 2^22000001000 is an apocalyptic number.

22000001000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22000001000 is an abundant number, since it is smaller than the sum of its proper divisors (29480003680).

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

22000001000 is a wasteful number, since it uses less digits than its factorization.

22000001000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22000022 (or 22000008 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 5.

Adding to 22000001000 its reverse (10000022), we get a palindrome (22010001022).

The spelling of 22000001000 in words is "twenty-two billion, one thousand".