20328840240 has 240 divisors, whose sum is σ = 68559897600. Its totient is φ = 4968967680.

The previous prime is 20328840229. The next prime is 20328840241. The reversal of 20328840240 is 4204882302.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20328840241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4379841 + ... + 4384479.

It is an arithmetic number, because the mean of its divisors is an integer number (285666240).

Almost surely, 2^20328840240 is an apocalyptic number.

20328840240 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 20328840240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34279948800).

20328840240 is an abundant number, since it is smaller than the sum of its proper divisors (48231057360).

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

20328840240 is a wasteful number, since it uses less digits than its factorization.

20328840240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4736 (or 4699 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 33.

The spelling of 20328840240 in words is "twenty billion, three hundred twenty-eight million, eight hundred forty thousand, two hundred forty".