20305205304 has 32 divisors (see below), whose sum is σ = 53434752000. Its totient is φ = 6412169952.

The previous prime is 20305205303. The next prime is 20305205309. The reversal of 20305205304 is 40350250302.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20305205303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22264024 + ... + 22264935.

It is an arithmetic number, because the mean of its divisors is an integer number (1669836000).

Almost surely, 2^20305205304 is an apocalyptic number.

20305205304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20305205304 is an abundant number, since it is smaller than the sum of its proper divisors (33129546696).

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

20305205304 is a wasteful number, since it uses less digits than its factorization.

20305205304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44528987 (or 44528983 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 24.

Adding to 20305205304 its reverse (40350250302), we get a palindrome (60655455606).

The spelling of 20305205304 in words is "twenty billion, three hundred five million, two hundred five thousand, three hundred four".