20285712304 has 80 divisors (see below), whose sum is σ = 46313598240. Its totient is φ = 8485908480.

The previous prime is 20285712283. The next prime is 20285712329. The reversal of 20285712304 is 40321758202.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20285712304.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 757902 + ... + 784210.

It is an arithmetic number, because the mean of its divisors is an integer number (578919978).

Almost surely, 2^20285712304 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 20285712304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23156799120).

20285712304 is an abundant number, since it is smaller than the sum of its proper divisors (26027885936).

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

20285712304 is a wasteful number, since it uses less digits than its factorization.

20285712304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26678 (or 26672 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

It can be divided in two parts, 20285712 and 304, that added together give a square (20286016 = 4504²).

The spelling of 20285712304 in words is "twenty billion, two hundred eighty-five million, seven hundred twelve thousand, three hundred four".