20504550384 has 80 divisors (see below), whose sum is σ = 59405840640. Its totient is φ = 6770957760.

The previous prime is 20504550383. The next prime is 20504550403. The reversal of 20504550384 is 48305540502.

20504550384 is a `hidden beast` number, since 20 + 5 + 0 + 4 + 550 + 3 + 84 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20504550383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175572 + ... + 268019.

It is an arithmetic number, because the mean of its divisors is an integer number (742573008).

Almost surely, 2^20504550384 is an apocalyptic number.

20504550384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20504550384 is an abundant number, since it is smaller than the sum of its proper divisors (38901290256).

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

20504550384 is a wasteful number, since it uses less digits than its factorization.

20504550384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443715 (or 443703 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The spelling of 20504550384 in words is "twenty billion, five hundred four million, five hundred fifty thousand, three hundred eighty-four".