20789475804 has 72 divisors (see below), whose sum is σ = 54528430320. Its totient is φ = 6670540800.

The previous prime is 20789475799. The next prime is 20789475809. The reversal of 20789475804 is 40857498702.

It is a happy number.

20789475804 is a `hidden beast` number, since 20 + 78 + 9 + 475 + 80 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (20789475799) and next prime (20789475809).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20789475809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 315484 + ... + 375644.

It is an arithmetic number, because the mean of its divisors is an integer number (757339310).

Almost surely, 2^20789475804 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 20789475804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27264215160).

20789475804 is an abundant number, since it is smaller than the sum of its proper divisors (33738954516).

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

20789475804 is a wasteful number, since it uses less digits than its factorization.

20789475804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60531 (or 60526 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 54.

The spelling of 20789475804 in words is "twenty billion, seven hundred eighty-nine million, four hundred seventy-five thousand, eight hundred four".