204030021234 has 16 divisors (see below), whose sum is σ = 439449276672. Its totient is φ = 62778468048.

The previous prime is 204030021233. The next prime is 204030021277. The reversal of 204030021234 is 432120030402.

It is a super-3 number, since 3×204030021234³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 204030021234.

It is not an unprimeable number, because it can be changed into a prime (204030021233) 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 7 ways as a sum of consecutive naturals, for example, 1307884674 + ... + 1307884829.

It is an arithmetic number, because the mean of its divisors is an integer number (27465579792).

Almost surely, 2^204030021234 is an apocalyptic number.

204030021234 is an abundant number, since it is smaller than the sum of its proper divisors (235419255438).

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

204030021234 is a wasteful number, since it uses less digits than its factorization.

204030021234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615769521.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 204030021234 its reverse (432120030402), we get a palindrome (636150051636).

The spelling of 204030021234 in words is "two hundred four billion, thirty million, twenty-one thousand, two hundred thirty-four".