204553243540 has 12 divisors (see below), whose sum is σ = 429561811476. Its totient is φ = 81821297408.

The previous prime is 204553243519. The next prime is 204553243561. The reversal of 204553243540 is 45342355402.

It is an interprime number because it is at equal distance from previous prime (204553243519) and next prime (204553243561).

It can be written as a sum of positive squares in 2 ways, for example, as 59474527876 + 145078715664 = 243874^2 + 380892^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 204553243540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5113831069 + ... + 5113831108.

It is an arithmetic number, because the mean of its divisors is an integer number (35796817623).

Almost surely, 2^204553243540 is an apocalyptic number.

204553243540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204553243540 is an abundant number, since it is smaller than the sum of its proper divisors (225008567936).

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

204553243540 is a wasteful number, since it uses less digits than its factorization.

204553243540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10227662186 (or 10227662184 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 37.

Adding to 204553243540 its reverse (45342355402), we get a palindrome (249895598942).

The spelling of 204553243540 in words is "two hundred four billion, five hundred fifty-three million, two hundred forty-three thousand, five hundred forty".