204543531120 has 80 divisors (see below), whose sum is σ = 635165596800. Its totient is φ = 54451982592.

The previous prime is 204543531083. The next prime is 204543531121. The reversal of 204543531120 is 21135345402.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×204543531120² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204543531121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 585070 + ... + 866829.

It is an arithmetic number, because the mean of its divisors is an integer number (7939569960).

Almost surely, 2^204543531120 is an apocalyptic number.

204543531120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204543531120 is an abundant number, since it is smaller than the sum of its proper divisors (430622065680).

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

204543531120 is a wasteful number, since it uses less digits than its factorization.

204543531120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452502 (or 1452496 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 204543531120 its reverse (21135345402), we get a palindrome (225678876522).

The spelling of 204543531120 in words is "two hundred four billion, five hundred forty-three million, five hundred thirty-one thousand, one hundred twenty".