204212134440 has 48 divisors (see below), whose sum is σ = 663689438100. Its totient is φ = 54456569088.

The previous prime is 204212134409. The next prime is 204212134453. The reversal of 204212134440 is 44431212402.

204212134440 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 1 + 213 + 4 + 440 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 190914815844 + 13297318596 = 436938^2 + 115314^2 .

It is a super-2 number, since 2×204212134440² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 283627605 + ... + 283628324.

Almost surely, 2^204212134440 is an apocalyptic number.

204212134440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204212134440 is an abundant number, since it is smaller than the sum of its proper divisors (459477303660).

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

204212134440 is a wasteful number, since it uses less digits than its factorization.

204212134440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567255946 (or 567255939 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 204212134440 its reverse (44431212402), we get a palindrome (248643346842).

The spelling of 204212134440 in words is "two hundred four billion, two hundred twelve million, one hundred thirty-four thousand, four hundred forty".