20803305600 has 1536 divisors, whose sum is σ = 98350848000. Its totient is φ = 4169318400.

The previous prime is 20803305587. The next prime is 20803305629. The reversal of 20803305600 is 650330802.

20803305600 is a `hidden beast` number, since 20 + 8 + 0 + 3 + 30 + 5 + 600 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 352598371 + ... + 352598429.

It is an arithmetic number, because the mean of its divisors is an integer number (64030500).

Almost surely, 2^20803305600 is an apocalyptic number.

20803305600 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 20803305600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49175424000).

20803305600 is an abundant number, since it is smaller than the sum of its proper divisors (77547542400).

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

20803305600 is a wasteful number, since it uses less digits than its factorization.

20803305600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The spelling of 20803305600 in words is "twenty billion, eight hundred three million, three hundred five thousand, six hundred".