20512224408 has 64 divisors (see below), whose sum is σ = 55353715200. Its totient is φ = 6296768640.

The previous prime is 20512224331. The next prime is 20512224409. The reversal of 20512224408 is 80442221502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20512224409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58203 + ... + 210741.

It is an arithmetic number, because the mean of its divisors is an integer number (864901800).

Almost surely, 2^20512224408 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 20512224408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27676857600).

20512224408 is an abundant number, since it is smaller than the sum of its proper divisors (34841490792).

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

20512224408 is a wasteful number, since it uses less digits than its factorization.

20512224408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152992 (or 152988 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 30.

The spelling of 20512224408 in words is "twenty billion, five hundred twelve million, two hundred twenty-four thousand, four hundred eight".