20906596920 has 256 divisors, whose sum is σ = 71330803200. Its totient is φ = 4856924160.

The previous prime is 20906596897. The next prime is 20906596937. The reversal of 20906596920 is 2969560902.

It is a self number, because there is not a number n which added to its sum of digits gives 20906596920.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3269086 + ... + 3275474.

It is an arithmetic number, because the mean of its divisors is an integer number (278635950).

Almost surely, 2^20906596920 is an apocalyptic number.

20906596920 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 20906596920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35665401600).

20906596920 is an abundant number, since it is smaller than the sum of its proper divisors (50424206280).

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

20906596920 is a wasteful number, since it uses less digits than its factorization.

20906596920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6518 (or 6514 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 48.

The spelling of 20906596920 in words is "twenty billion, nine hundred six million, five hundred ninety-six thousand, nine hundred twenty".