20409846912 has 768 divisors, whose sum is σ = 77098291200. Its totient is φ = 5267275776.

The previous prime is 20409846907. The next prime is 20409846913. The reversal of 20409846912 is 21964890402.

It is not an unprimeable number, because it can be changed into a prime (20409846913) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 160707393 + ... + 160707519.

It is an arithmetic number, because the mean of its divisors is an integer number (100388400).

Almost surely, 2^20409846912 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 20409846912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38549145600).

20409846912 is an abundant number, since it is smaller than the sum of its proper divisors (56688444288).

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

20409846912 is a wasteful number, since it uses less digits than its factorization.

20409846912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 20409846912 in words is "twenty billion, four hundred nine million, eight hundred forty-six thousand, nine hundred twelve".