20522440000 has 140 divisors (see below), whose sum is σ = 53103926304. Its totient is φ = 7851712000.

The previous prime is 20522439953. The next prime is 20522440007. The reversal of 20522440000 is 4422502.

It is a self number, because there is not a number n which added to its sum of digits gives 20522440000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20522440007) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 908847 + ... + 931153.

Almost surely, 2^20522440000 is an apocalyptic number.

20522440000 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 20522440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26551963152).

20522440000 is an abundant number, since it is smaller than the sum of its proper divisors (32581486304).

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

20522440000 is an equidigital number, since it uses as much as digits as its factorization.

20522440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22362 (or 22337 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

Adding to 20522440000 its reverse (4422502), we get a palindrome (20526862502).

The spelling of 20522440000 in words is "twenty billion, five hundred twenty-two million, four hundred forty thousand".