20225543212 has 216 divisors, whose sum is σ = 46924430112. Its totient is φ = 7564677120.

The previous prime is 20225543207. The next prime is 20225543213. The reversal of 20225543212 is 21234552202.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (20225543213) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 128825038 + ... + 128825194.

It is an arithmetic number, because the mean of its divisors is an integer number (217242732).

Almost surely, 2^20225543212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20225543212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23462215056).

20225543212 is an abundant number, since it is smaller than the sum of its proper divisors (26698886900).

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

20225543212 is a wasteful number, since it uses less digits than its factorization.

20225543212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The spelling of 20225543212 in words is "twenty billion, two hundred twenty-five million, five hundred forty-three thousand, two hundred twelve".