22545440000 has 90 divisors (see below), whose sum is σ = 56235912810. Its totient is φ = 9018112000.

The previous prime is 22545439993. The next prime is 22545440017. The reversal of 22545440000 is 4454522.

It can be written as a sum of positive squares in 5 ways, for example, as 7500945664 + 15044494336 = 86608^2 + 122656^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 89546 + ... + 230454.

Almost surely, 2^22545440000 is an apocalyptic number.

22545440000 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 22545440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28117956405).

22545440000 is an abundant number, since it is smaller than the sum of its proper divisors (33690472810).

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

22545440000 is an frugal number, since it uses more digits than its factorization.

22545440000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140945 (or 140916 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 26.

Adding to 22545440000 its reverse (4454522), we get a palindrome (22549894522).

The spelling of 22545440000 in words is "twenty-two billion, five hundred forty-five million, four hundred forty thousand".