204030021144 has 32 divisors (see below), whose sum is σ = 510339046320. Its totient is φ = 67974807936.

The previous prime is 204030021137. The next prime is 204030021187. The reversal of 204030021144 is 441120030402.

It is a self number, because there is not a number n which added to its sum of digits gives 204030021144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2152587 + ... + 2245370.

Almost surely, 2^204030021144 is an apocalyptic number.

204030021144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

204030021144 is an abundant number, since it is smaller than the sum of its proper divisors (306309025176).

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

204030021144 is a wasteful number, since it uses less digits than its factorization.

204030021144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4399899 (or 4399895 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 204030021144 its reverse (441120030402), we get a palindrome (645150051546).

The spelling of 204030021144 in words is "two hundred four billion, thirty million, twenty-one thousand, one hundred forty-four".