20465573912 has 64 divisors (see below), whose sum is σ = 44719153920. Its totient is φ = 8598365568.

The previous prime is 20465573881. The next prime is 20465573917. The reversal of 20465573912 is 21937556402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20465573917) 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, 5183123 + ... + 5187069.

It is an arithmetic number, because the mean of its divisors is an integer number (698736780).

Almost surely, 2^20465573912 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 20465573912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22359576960).

20465573912 is an abundant number, since it is smaller than the sum of its proper divisors (24253580008).

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

20465573912 is a wasteful number, since it uses less digits than its factorization.

20465573912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5760 (or 5756 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 20465573912 in words is "twenty billion, four hundred sixty-five million, five hundred seventy-three thousand, nine hundred twelve".