20204554500 has 288 divisors, whose sum is σ = 69170066784. Its totient is φ = 4935168000.

The previous prime is 20204554481. The next prime is 20204554501. The reversal of 20204554500 is 545540202.

20204554500 is a `hidden beast` number, since 2 + 0 + 204 + 5 + 5 + 450 + 0 = 666.

It can be written as a sum of positive squares in 16 ways, for example, as 20167976196 + 36578304 = 142014^2 + 6048^2 .

It is not an unprimeable number, because it can be changed into a prime (20204554501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8013240 + ... + 8015760.

It is an arithmetic number, because the mean of its divisors is an integer number (240173843).

Almost surely, 2^20204554500 is an apocalyptic number.

20204554500 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 20204554500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34585033392).

20204554500 is an abundant number, since it is smaller than the sum of its proper divisors (48965512284).

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

20204554500 is a wasteful number, since it uses less digits than its factorization.

20204554500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2696 (or 2681 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The spelling of 20204554500 in words is "twenty billion, two hundred four million, five hundred fifty-four thousand, five hundred".